You starting talking about lumens and how you should buy lights on lumens not watts. But then how lumens is what people see and plants need the opposite? Can someone please help me with this I’m having a hard time finding a good light and this lumen, watt, color temp, is killing me right now. So can higher lumens actually be less blue and red light?
TheStarkEdelics Channel at the time, I was trying to help people understand that wattage has nothing to do with intensity or useable photosynthetic light. Lumens is measured in the green part of the spectrum. The part that human eyes are most sensitive to. Lumens can give you an idea of intensity but it doesn’t say much about the overall PAR which covers the most usable part of the visible spectrum that human eyes are less sensitive to. Plants utilize mostly wavelengths outside of the green zone and the only way to measure that is with a quantum sensor, not a lumen meter. So if one was to buy a red/blue dominant grow light and use a lumen meter, the lumen level would be low, but the par readout would tell another story. Mainly, if trying to figure out the appropriate distance your light needs to be from the plant canopy, a lumen meter won’t be appropriate. If it’s white light and one is familiar with a their lumen meter, it can be used to a extent so long as they figured it out with trial and error. But if it’s not a white light source, it would be very difficult to use a lumen meter reliably. The only meter that is consistent and proven is a quantum par sensor. So do not buy a grow light based off lumens. If it’s led and it’s unidirectional light, then wattage would be a more reliable way to purchase so long as you’ve established a baseline of what can be grown per actual watt. But you can’t intermix that measure. 50 watts of fluorescent isn’t going to be the same as 50 watts of led. And certainly 50 watts of incandescent doesn’t even compare. basically the less radiated infrared heat output by a light source with the same wattage compared to another light source, means in general, more usable photosynthetic light per watt. that’s the basis of describing efficiency and lumens plays a part in that understanding, but lumens alone is not measuring light for growing plants in a way that is reliable or complete.
Don't ever think it. If your growing non cannabis grows just grab a 300 watt led... If growing cannabis grab something that switches from more blue for veg an more red for flower.. and a higher watt if growing cannabis..
I never leave comments, ever! I am only doing so for all the haters out there... Random Ryan explains very well the basics of how plants respond to the light spectrum. This information is not only rare for novice growers but Super helpful. Don't take those knuckle draggers seriously. Not everyone out there is experienced worth grow lights; take it from me!
Thanks for this video. Kinda gets old when damn near every video about growing indoor is about Marry J. Refreshing to find one that's not focused on that one specific plant. Great info!
Thank you so much for this. I have been attempting to find some science, or at least some specifics, about LED lighting. While I wasn't looking to delve so deep that my head would explode, you have explained some things that I did need to understand. In my case, the information is for planted freshwater aquariums, and what makes for a good light. So much in the area is opinionated, twisted into experience; so that the 'best light', is the one that was just bought by the presenter; although they can't give you any real facts or evidence because they just put it to use 15minutes ago or 3 days ago ("so far, it seems to be growing them just fine"). I still may end up mandatorily buying an underwater PAR meter, but you've helped elevate my understanding of what is taking place after you switch an LED 'on'.
Excellent video sir! You explained perfectly in lamen's terms how light affects plants, and a wee bit of the science behind it! Having worked in the lighting industry for some time now, I consider my self a 'lightologist'! lol I have worked with florescent to H.I.D's and with LEDs. And yes, I have grown under all of these. I have to say, I was a die hard Halide/Sodium guy, but these new LED diodes that are available are remarkable! Use to be they were only manufactured for the 'human' market for power savings, but the new horticultural applications are coming of age! Must be because cannabis is becoming legal everywhere (i'm Canadian!), so the market is really taking off! Keep up the great work, and I'm off to watch patr 2 of your vid! Cheers lad. :)
I use composted lawn clippings mixed with eggshells. I let tap water sit in a bucket for 24 hours to release chlorine gas. I'm using two cheap worklights from the hardware store 30 watt led and 60 watt led. After the first 4 weeks I use seaweed compost and fish emolsion for fertilizer. At the 6 weeks time I use liquid potassium for root and flower development. First time using led lights and the small watt lights are working. Been growing since 1985.
I was wondering even by growing them by seed do you need a plant light because I bought a LED or 20 from Walmart believe it's red or purple 50w 450-650nm non dimmable medium base shatter resistant LED some of the seeds are good to go and some of them leaves to be indoors I was wondering if I'm doing something right or if I'm going the wrong way
Hi, Very kind of you to reply, thank you. I have my aeroponic system finished and just need to install lighting, I live in the northern hemisphere with short days, therefore lighting needs to be full spectrum and adequate. I have spend days and days reading the available information and am totally confused, obviously like the current election in the US 90% of the information is not based on a desire to help, it is business. In your case you appear to be offering your experience with sincerity and it is much appreciated. From your reply to my first question the suggestion is that all that is needed for the entire growing process is 3500k fluorescent, is that correct? From seed to fruit, tomatoes, pepper, strawberries etc? My situation is that there is virtually no ambient lighting, the growing bed has 32 planters and is approximately 1.5 M x 1 m, temperature and water will be carefully controlled. Therefore my simple question, if you would be so kind, would you imagine that a couple of 4' white 3500k fluorescent tubes would be adequate? Thanks once more, Geoffrey (Czech Republic by the way).
Hi, I can't afford LED yet. I wanted to ask which lights are best for growing crops indoors, like Pak Choi and lettuce Etc. I have the option of HPS, metal halide and dual Spectrum from sunmaster, all 400w. Which one should I go for? Thank you!
Hey man. Led strips 4 ft long in day light white are 13$ and some change at rural king. They are bright as shit. Full spectrum. I started with 4 and gotta wear shades when I’m doing things.
Hi, i have a question. Is a grow led light just a white led stripe? Is there something different than an high efficiency indoor led lamp? Like a 100watt one? Thanks!
I have a LED light bar from an old aquarium how do I tell if it's full spectrum . There's numbers on it as follows 375-450mah 470*20*1 6mm that's the only numbers on it . I mean I plants in my aquarium no window near it . So would it be suitable for normal non aqautic plants? .
LED grow lighting that only peaks in the red and blue regions of the spectrum is based on outdated research that only takes into account the absorption spectrum of isolated chlorophyll extract. The photosynthetic action spectrum in intact plant leaves is quite even across the entire spectrum including up to 70% usage of wavelengths in the green region of the spectrum. The best horticultural LED manufactuers are shifting to full spectrum white LEDs that often utilize red phosphors to add in the red part of the spectrum. www.heliospectra.com/sites/default/files/general/What%20light%20do%20plants%20need_5.pdf I can already tell without watching the rest of this series that the white LED will grow plants better. Although the white LED you are using uses blue chip plus yellow phosphor (which isn't ideal because it doesn't have much in the red area of the spectrum) it is still better than using solely red and blue leds.
Some LEDs are starting to use red and sometimes green phosphors to create fuller spectrum and higher color rendering. Here is a forum thread describing a COB chip that I designed using red and green phosphor for growing plants in planted aquariums/vivariums. www.dendroboard.com/forum/parts-construction/328713-first-perfect-sunlight-mimicking-95cri-vivarium-led.html
Nice video, have you made a video where you take a 3w led, 6500k, and check what colour spectrum it might be throwing out, like I mean maybe its pumping 400 to 700, but how much? Thanks
Great video, I have been trying to find the information that you provided about photosynthetic response for hours now, thank you very much. Do you have a link to the studies that you talked about with different lighting used throughout the faces of growing a plant?
You might find that info on certain light manufacturer websites, but exactly how it's done, I have no info on that. Google that instead of looking for RUclips videos cuz I'm pretty sure there are none. It holds little value to the general viewer except interest and only high tech green houses would be doing it. If any video is done, it likely would be from a journalist or reporter doing segments on those places and led tech.
I use a 100w CFL at five inch distance , two 20 w LEDs and a 60 w LED flood light on Four plants at a 10 inch distance. Seedlings didn’t “reach” and fall over like my last crop when I didn’t have this much light.
It is interesting you mention the weed. I guess most dudes aren't into "gardening" and "Flowers", it's more of an older female thing. So when a younger guy is getting all excited talking about growing stuff, especially artificially in the basement, i guess that would be the obvious :P I have a question: For the winter, I have some plants (sorry, not weed :P) like chili peppers and a rosemary that i'd like to supplement them with light. Also, in the spring, I start alot of things from seed before the last frost in May. It's just whatever i can fit onto 2 or 3 shelves of a shelving unit. It does get some natural light -- a small window facing south, but it's usually not enough light. The 50w looks a little overkill for what i'd need...i think? There is 10w, 20w, 30w available. Would the 20w or 30w be good enough for me?
Great! I think it's good to approach this with a "scientific mind" because then one can make decisions for themselves when choosing lights, and not be scammed by marketing claims. And it's nice to know how stuff works too!
Hello Random Ryan, thank you for the 4 parts of your experiment, I learned a lot even though I only understood a portion... I am sold on the white light you used (daylight white for about 180$ on Amazon) the size is just right for me) and I would like to use it for salads, herbs and watercress on a shelf in the basement where I live. However I am concern about the safety for my eyes even though I won't be staring at the light, I will be in the same medium size room for hours at the time. Do you have any advise regarding this situation? thank you again
Sophie Mo you don't need to worry about your eyes. Just wear sunglasses if you feel the need. Also if it's in a large room and not a closet, heat shouldn't be an issue. With any plant growing, air exchange and ventilation is mildly important. Airflow prevents things from settling on leaves and air exchange keeps co2 levels from declining if the plants are in a small non-ventilated space. It also keeps humidity from rising and causing molds or fungus.
İ ve got 1.5 *1*1 growing area and ive got two 50watt LED light and one 50watt Pink LED light on. Do you think its enough? By the way ive got 3 plants 😎 thanks
Im growing chili plants indoors i have a 6 bulb Badboy T5 i only use 2 and not 6 i can use 4 or all 6 but i think its way to hot my question is...is this a good light for my chili's
kind of a loaded question bro, I'd say a ceramic metal halide is considered the most influenced primary, closest to natural sunlight, but to understand photosynthesis, my best answers would be all of above spectrum, red,blue,white,orange,violet,and last 2 weeks ultra violet
Very informative, but i don't understand one thing tho. Like you said the white led light is full spectrum, but are 5000-5400 kelvin lights not used in studio's for photography and not suitable for growing plants? You'd need cool white (6500k) and warm white(2700k) and you have blue and red spectrums, right?
That light is actually 6000k. It's fine for vegging. You need a certain ratio of red to blue to flower/fruit. You don't need 2 different lights for the growth process. You can use one or a set of 3000-3500k lights or even 4000k to have that ratio. However, the grow test is to provide more info than just a simple yes or no answer. Switching lights is usually done to try to squeeze the most out of what you are growing. It's not required.
I must be overthinking this; can you summarize, I've watched all 3 vids thus far. The white light that you're testing is 6000k, which showed better results (via vid 2). But in the post above you stated "you don't need 2 lights for growth process, you need 6500k AND 2700K"; isn't that 2 lights? Or more simply are you saying that this one 6000k 50watt light supplies all of it and can do both veg and flower with it? My mind is spinning from reading and watching too many contradicting studies, but your video 2 results seem the clearest to me, so thanks for that!
Sarah Longenecker well the light demonstrated in part 1 is 6000k. The light used in part 2 is 3000k. 6000k is great for veg. 3000-3500k can be used for the whole process. The only reason you would use a light for veg and a light for flower is to get a plant larger during veg and keep it growing more leaves without triggering flowering. Depends on if a plant has a photoperiod though. Switching lights during phases is an attempt to get the best you can get or simply put, to control growth.
Ah, I completely missed that it was a different light; thanks for clearing that up! I looked on amazon for this light and I can only find the 6000k, do you have a link to the 3000k? Have you done a growth compare between 6000k white vs 3000k white? When is video 4 coming out, can't wait? Any experience with this light, www.amazon.com/gp/product/B01HI3AFYM/ref=crt_ewc_title_dp_6?ie=UTF8&psc=1&smid=A2L94QV6P0R9ON ? Thank You!
Sarah Longenecker that light seems great for the price. It should easily outperform 2 of the same 3000k light I used . It's actually draw is 124 watts, not 300. Part 4 should be out in the next few weeks. Some people might say those brands of lights are crap, but for the price, it's perfect for a general hobbyist. Heck, the pink light I used in the video was $70. Also there really is no real good reason to compare a 3000k to a 6000k. lights that favor the blue spectrum are good for plants that are leafy greens, but you can use both for veg. You wouldn't use a 6000k for flower or fruiting though. It would suppress the production of auxin and reduce the amount of flowering. However, a 3000k won't hinder the veg state, it more or less just allows the plant to put some energy into flowers intend of all of it into leaves. While the sun changes its shades over the season depending how much atmosphere it's filtered through, we don't change the sun to manipulate plants. Many plants will produce during peak summer while the sun is 4000-5000k. However, the color temperature changes during sunrise and sunset and through the day during its transition to and from its peak. At no time is the sun just blue though, so using 6000k or higher really is just to suppress flowering. Otherwise outside it would just flower if it doesn't have a photoperiod.
I’ve made the biggest mistake going.two crops messed up.i bought some 660 full spectrum lights and stuck them on full power.little did I know my plants wasn’t getting full spectrum but on the lower setting it was.my plants at first looked 100% but soon were showing signs nitrogen toxicity so I thought I had a ph problem.no,no,no.it was the spectrum.
What wattage is needed from a red/blue LED light to get a PAR of 700 -1500? Does the Sun put out a flat light wave levels across the entire spectrum? Since the PAR meter are only measures 400nm - 700nm then the PAR number you get is the addition of blue, green, and red wavelengths.
+sodaman2006 If you mean without passing through the earths atmosphere the suns spectrum looks like this sciencequestionswithsurprisinganswers.org/images/sunlight_wavelength.png
+Simple Logic Thanks for the post. I found that going through the atmosphere it is reduced. If it wasn't for that fact we would'nt be able to grow anything outside. www.calpoly.edu/~rfield/Thermalstructure_files/image002.gif
sodaman2006 Yes, afaik the overall intensity is reduced along with alot of the black light, aswell as most of the UV, and some of the IR. Leaving us with a spectrum that looks like this www.fondriest.com/environmental-measurements/wp-content/uploads/2014/03/par_solar-radiation.jpg But the spectrum on earth changes with where on earth you measure it, and at what time of year, and what time of day. Generally those changes are measured in Kelvin www.d.umn.edu/~mharvey/tempbar.jpg
Fabulous series, thank you Would a mixture of cool white, 6000 - 6500 K, warm white, 2800 - 3200K and natural white 400 - 4500K be a satisfactory full spectrum lighting system for grow lights?
Geoffrey Terry aquarium lights use this technique by mixing various color temperature of whites, but the results would not be dramatically different for plants. 3500k is all you really need for general growth.
I'm on a low budget. I just was given a 400 watt MH bulb that used to hang in a wal mart. I'm gonna retro fit it for my veg room. I wonder what cannabis would do if flowered under MH? On a different note, I've been getting good results from an array of 100w equivalent Sylvania LED home lights. Remove the plastic diffuser and there are up to 17 tiny lights. I have about 30 in an array atm. They work well. I need more of them though. This is a DIY thing I learned from Grass City
@@GrowingAnswers what if I supplement warm light, in equivalent amounts with led's? sounds janky but it's all I have. Since it's winter I don't have too much problems with heat created by bulbs/ballasts etc , but come summer I will have to use only LEDs.
man dont stuck when you talk you are doing well you hellped a lot ty man indeed i need this help for mj seeds :D but look it frome the good side of educational porpose keep the good work up ty again!
Could you please make a video with upside down lighting? I would suggest to use about 5x 1 feets of cheap ribbon LED found on Ebay. Lay them just above soil, LED facing up. Once the plant has grow one feet, add a second layer of ribbon LED, 10 cm above the soil, LED facing down. Once the plant has grow again, add a third layer of ribbon, 10 cm above soil, LED facing up. My hypothesis is that the plant will grow bushier sice it doesn't have to cover distance to get the best illumination.
at least let me know what the optimum distance from the white led is. i know the red/blue is 12 to 24 inches depending on the wattage, but i don't know about the white leds.
+xephorce part 2 is coming soon. The experiment is almost done. In my opinion, 12 inches works fine. I haven't noticed any issues being closer either. At least for a short time.
Photosynthesis efficiency is pretty low. Around 2%. I wonder... is it more efficient to feed plants directly from sunlight or perhaps feed sunlight to PV then electricity to LED then optimized spectrum to plants. If the latter it makes no sense to grow things under sunlight instead of led or mh lamp.
@@brasilvirals hey, I am not sure whether to get a 3000k or 4000k led (supplementary for my balcony plants). Is there a large difference between the two ?
@@kurodesuuuu Hello, how are you? yes there is a big difference 4000k led has a light spectrum suitable for plant growth. If you don't have a 4000k one, you can use a 3000k one along with 6000k LED, as this will give you the full spectrum of light. In relation to cannabis we have a vegetative and flowering stage, so it is a little more advanced, yet it is much easier than the internet, because companies try to make us believe that we need special super lamps. See this picture. i.ibb.co/f8bphVB/hjh.png it has the spectra values specific to each color temperature. see this other http2.mlstatic.com/led-grow-profissional-samsung-4000k-veg-flora-cultivo-indoor-D_NQ_NP_886096-MLB29851249987_042019-F.jpg this is the value on the graph you need, so comparing with the frequencies, for chlorophyll a and chlorophyll b, we get those values, a 4000k led or 3000k plus a 6000k led. Thank you friend and a hug
@@brasilvirals Thank you so much! I was getting really confused with all the grow light companies promoting the purple colored lights- this makes things much easier
Ok so what if I get regular red and blue bulbs will they grow plants or do I need LED's also what if i tint flourscent bulbs red and blue???????? anyone know the answere
John E watch part 4. Simple answer is, use white light. Led or fluorescent depending on your plant type. organisms that only require red/blue are types of algae. All plants use a broad spectrum. Not just red/blue.
by far the best video series on the subject! Ryan you shouldn't worry about an occasional pothead with negative comments, especially ones who can't follow basic english likely due to Tetrahydrocannabinol induced brain damage.
so instead of buying a normal powerful white led that will consume more energy and it will waste it on the yellow/green spectrum which will not make any difference to the plant , focusing that energy on a red/blue light will make far better results?
Thank you... very informative.. seems like a black science ..starting tomatoes early indoors. I have both lights.. ill share with u my results.. but thanks for sharing ur red spectrum..😁
Very well done, very good info. Just what i needed to know . I plan on building My own soon, and switching My Mars II's to C.O.B. chips. Thanks, respect.......Seven Thunders///////
You starting talking about lumens and how you should buy lights on lumens not watts. But then how lumens is what people see and plants need the opposite? Can someone please help me with this I’m having a hard time finding a good light and this lumen, watt, color temp, is killing me right now. So can higher lumens actually be less blue and red light?
TheStarkEdelics Channel at the time, I was trying to help people understand that wattage has nothing to do with intensity or useable photosynthetic light. Lumens is measured in the green part of the spectrum. The part that human eyes are most sensitive to. Lumens can give you an idea of intensity but it doesn’t say much about the overall PAR which covers the most usable part of the visible spectrum that human eyes are less sensitive to. Plants utilize mostly wavelengths outside of the green zone and the only way to measure that is with a quantum sensor, not a lumen meter. So if one was to buy a red/blue dominant grow light and use a lumen meter, the lumen level would be low, but the par readout would tell another story. Mainly, if trying to figure out the appropriate distance your light needs to be from the plant canopy, a lumen meter won’t be appropriate. If it’s white light and one is familiar with a their lumen meter, it can be used to a extent so long as they figured it out with trial and error. But if it’s not a white light source, it would be very difficult to use a lumen meter reliably. The only meter that is consistent and proven is a quantum par sensor. So do not buy a grow light based off lumens. If it’s led and it’s unidirectional light, then wattage would be a more reliable way to purchase so long as you’ve established a baseline of what can be grown per actual watt. But you can’t intermix that measure. 50 watts of fluorescent isn’t going to be the same as 50 watts of led. And certainly 50 watts of incandescent doesn’t even compare. basically the less radiated infrared heat output by a light source with the same wattage compared to another light source, means in general, more usable photosynthetic light per watt. that’s the basis of describing efficiency and lumens plays a part in that understanding, but lumens alone is not measuring light for growing plants in a way that is reliable or complete.
Growing Answers so helpful thank you so much!!
Don't ever think it. If your growing non cannabis grows just grab a 300 watt led... If growing cannabis grab something that switches from more blue for veg an more red for flower.. and a higher watt if growing cannabis..
Do you use Wechat or SKype? Maybe I can help you. My WeChat/whatsapp/Skype: +86 18129800313
@@hobertzheng what brand you use
I never leave comments, ever! I am only doing so for all the haters out there... Random Ryan explains very well the basics of how plants respond to the light spectrum. This information is not only rare for novice growers but Super helpful. Don't take those knuckle draggers seriously. Not everyone out there is experienced worth grow lights; take it from me!
korieadell thanks!
yeah leave the guy alone I've learnt stacks
One the best videos explaining growing lights. Part 2 is also awesome. Thanks a bunch.
Thanks for this video. Kinda gets old when damn near every video about growing indoor is about Marry J. Refreshing to find one that's not focused on that one specific plant. Great info!
hey what's wrong with the downvotes? this is a very comprehensive and clear explanation video.
very I'm formative thank you for taking your time and explaining everything
The quality of this lesson made me gonna binge watch ur channel. Thank you.
Sir is this applicable for aquatic plants too?
Please reply sir.
Any light works for aquatic plants. They are not special.
Thank you so much for this. I have been attempting to find some science, or at least some specifics, about LED lighting. While I wasn't looking to delve so deep that my head would explode, you have explained some things that I did need to understand. In my case, the information is for planted freshwater aquariums, and what makes for a good light. So much in the area is opinionated, twisted into experience; so that the 'best light', is the one that was just bought by the presenter; although they can't give you any real facts or evidence because they just put it to use 15minutes ago or 3 days ago ("so far, it seems to be growing them just fine"). I still may end up mandatorily buying an underwater PAR meter, but you've helped elevate my understanding of what is taking place after you switch an LED 'on'.
Kilmichael talk to me first. I dedign led white spectrum lighting. I was the first.
Being a scientist myself I really like your approach. Thanks and keep it up!
Vadim Melnicuk hey I have a led full spectrum light and a CFL is that bad
Excellent video sir! You explained perfectly in lamen's terms how light affects plants, and a wee bit of the science behind it! Having worked in the lighting industry for some time now, I consider my self a 'lightologist'! lol I have worked with florescent to H.I.D's and with LEDs. And yes, I have grown under all of these. I have to say, I was a die hard Halide/Sodium guy, but these new LED diodes that are available are remarkable! Use to be they were only manufactured for the 'human' market for power savings, but the new horticultural applications are coming of age! Must be because cannabis is becoming legal everywhere (i'm Canadian!), so the market is really taking off! Keep up the great work, and I'm off to watch patr 2 of your vid! Cheers lad. :)
wow! you are really able to explain in a way that everybody could understand.
Even me ;)
great video
The burple lites make my weed plnts have impressive colors like
Green purple blue hues on the leaves.
Purple red on the stems .
bro?
I use composted lawn clippings mixed with eggshells. I let tap water sit in a bucket for 24 hours to release chlorine gas. I'm using two cheap worklights from the hardware store 30 watt led and 60 watt led. After the first 4 weeks I use seaweed compost and fish emolsion for fertilizer. At the 6 weeks time I use liquid potassium for root and flower development. First time using led lights and the small watt lights are working.
Been growing since 1985.
That’s passion right there
Great video... I feel like there should be a quiz after watching/learning this much information.
Thank you so much for such informative videos! They are so helpful!
I have a few led videos if intrested
Damn this video answered A LOT of my questions, thank you sir.
You are a true teacher! Thanks for the video.
Are 40W 5000LM 6500K shop lights full spectrum? Great video!
Awesome detail. Loved all the info. This has helped me understand so much. I'll be watching this a couple more times
Amazing explanation, this is exactly what I was looking for
I was wondering even by growing them by seed do you need a plant light because I bought a LED or 20 from Walmart believe it's red or purple 50w 450-650nm non dimmable medium base shatter resistant LED some of the seeds are good to go and some of them leaves to be indoors I was wondering if I'm doing something right or if I'm going the wrong way
Thank you very much for awesome information and now I know why certain things are happening with my vegetables. 😉
The white led is ordinari led lamp we can buy at any electric shop right?
Hi,
Very kind of you to reply, thank you.
I have my aeroponic system finished and just need to install lighting, I live in the northern hemisphere with short days, therefore lighting needs to be full spectrum and adequate. I have spend days and days reading the available information and am totally confused, obviously like the current election in the US 90% of the information is not based on a desire to help, it is business.
In your case you appear to be offering your experience with sincerity and it is much appreciated.
From your reply to my first question the suggestion is that all that is needed for the entire growing process is 3500k fluorescent, is that correct? From seed to fruit, tomatoes, pepper, strawberries etc? My situation is that there is virtually no ambient lighting,
the growing bed has 32 planters and is approximately 1.5 M x 1 m, temperature and water will be carefully controlled.
Therefore my simple question, if you would be so kind, would you imagine that a couple of 4' white 3500k fluorescent tubes would be adequate?
Thanks once more,
Geoffrey (Czech Republic by the way).
very will explained thank you very much for that excellent informative video .
I bought a mars 600 for growing it really works good, much better than I thought before
Can you please help me with building lights for aquatic plants
Very informative.
Can you do a video explaining ummols?
Hi, I can't afford LED yet. I wanted to ask which lights are best for growing crops indoors, like Pak Choi and lettuce Etc. I have the option of HPS, metal halide and dual Spectrum from sunmaster, all 400w. Which one should I go for? Thank you!
Phaik Youser you can just use a house led flood light
Hey man. Led strips 4 ft long in day light white are 13$ and some change at rural king. They are bright as shit. Full spectrum. I started with 4 and gotta wear shades when I’m doing things.
Hi, i have a question.
Is a grow led light just a white led stripe?
Is there something different than an high efficiency indoor led lamp? Like a 100watt one?
Thanks!
Kentilor ruclips.net/video/vmtwgJgHtL0/видео.html
You are a great teacher! Thank you !🌻
How long /how many hours should I keep them on when starting vegetable plants what have grown about 6-8 tall??
I have a LED light bar from an old aquarium how do I tell if it's full spectrum . There's numbers on it as follows 375-450mah 470*20*1 6mm that's the only numbers on it . I mean I plants in my aquarium no window near it . So would it be suitable for normal non aqautic plants? .
Jake Allen it’s likely not intense enough unless it lettuce and small herbs you want to grow
Ryan. This is a very good video. Very informative and good graph to explain the concept. Thanks
Does red and blue lights work better then white light's
Great video! Thanks for teaching me so much!! Very well done 🌬🌿💙🌱🍃
LED grow lighting that only peaks in the red and blue regions of the spectrum is based on outdated research that only takes into account the absorption spectrum of isolated chlorophyll extract. The photosynthetic action spectrum in intact plant leaves is quite even across the entire spectrum including up to 70% usage of wavelengths in the green region of the spectrum. The best horticultural LED manufactuers are shifting to full spectrum white LEDs that often utilize red phosphors to add in the red part of the spectrum. www.heliospectra.com/sites/default/files/general/What%20light%20do%20plants%20need_5.pdf
I can already tell without watching the rest of this series that the white LED will grow plants better. Although the white LED you are using uses blue chip plus yellow phosphor (which isn't ideal because it doesn't have much in the red area of the spectrum) it is still better than using solely red and blue leds.
Joshua Turner what other type of white led is there that doesn’t use a yellow phosphor to make it white?
Some LEDs are starting to use red and sometimes green phosphors to create fuller spectrum and higher color rendering. Here is a forum thread describing a COB chip that I designed using red and green phosphor for growing plants in planted aquariums/vivariums. www.dendroboard.com/forum/parts-construction/328713-first-perfect-sunlight-mimicking-95cri-vivarium-led.html
@@FinehomesofNewHampshire I would like to learn more about your knowledge of LEDs are you willing to share with a humble grower such as myself?
wow wish I had seen this video years a go and I would have saved a lot of money. I really learned a ton.
Nice video, have you made a video where you take a 3w led, 6500k, and check what colour spectrum it might be throwing out, like I mean maybe its pumping 400 to 700, but how much? Thanks
Great video, I have been trying to find the information that you provided about photosynthetic response for hours now, thank you very much. Do you have a link to the studies that you talked about with different lighting used throughout the faces of growing a plant?
You might find that info on certain light manufacturer websites, but exactly how it's done, I have no info on that. Google that instead of looking for RUclips videos cuz I'm pretty sure there are none. It holds little value to the general viewer except interest and only high tech green houses would be doing it. If any video is done, it likely would be from a journalist or reporter doing segments on those places and led tech.
I use a 100w CFL at five inch distance , two 20 w LEDs and a 60 w LED flood light on Four plants at a 10 inch distance. Seedlings didn’t “reach” and fall over like my last crop when I didn’t have this much light.
It is interesting you mention the weed. I guess most dudes aren't into "gardening" and "Flowers", it's more of an older female thing. So when a younger guy is getting all excited talking about growing stuff, especially artificially in the basement, i guess that would be the obvious :P
I have a question:
For the winter, I have some plants (sorry, not weed :P) like chili peppers and a rosemary that i'd like to supplement them with light. Also, in the spring, I start alot of things from seed before the last frost in May.
It's just whatever i can fit onto 2 or 3 shelves of a shelving unit. It does get some natural light -- a small window facing south, but it's usually not enough light.
The 50w looks a little overkill for what i'd need...i think? There is 10w, 20w, 30w available. Would the 20w or 30w be good enough for me?
what brand is the white led growlight/?
any links looks impresive im interested in buying one any advice?
Shaz Soo watch the other links in the description. You may want to reconsider.
Great! I think it's good to approach this with a "scientific mind" because then one can make decisions for themselves when choosing lights, and not be scammed by marketing claims. And it's nice to know how stuff works too!
Is COB LED with phosfor coat better than COB with red blue??
Good video man, are you a sparky? For me PAR typically stands for parabolic aluminum reflector, haha
Hello Random Ryan, thank you for the 4 parts of your experiment, I learned a lot even though I only understood a portion...
I am sold on the white light you used (daylight white for about 180$ on Amazon) the size is just right for me) and I would like to use it for salads, herbs and watercress on a shelf in the basement where I live. However I am concern about the safety for my eyes even though I won't be staring at the light, I will be in the same medium size room for hours at the time. Do you have any advise regarding this situation?
thank you again
Sophie Mo you don't need to worry about your eyes. Just wear sunglasses if you feel the need. Also if it's in a large room and not a closet, heat shouldn't be an issue. With any plant growing, air exchange and ventilation is mildly important. Airflow prevents things from settling on leaves and air exchange keeps co2 levels from declining if the plants are in a small non-ventilated space. It also keeps humidity from rising and causing molds or fungus.
Hello Random Ryan, thank you so much for your reply, just to be clear (my English is not good good) I am living in the basement...
İ ve got 1.5 *1*1 growing area and ive got two 50watt LED light and one 50watt Pink LED light on. Do you think its enough? By the way ive got 3 plants 😎 thanks
probably more than enough
@@GrowingAnswers thank you.. 🙏
I got CFL 1600lumens 100 W 3500k would they work THANKS
Julius Steele get a 300 watt for flowering it worked wonders for me a few years back
Im growing chili plants indoors i have a 6 bulb Badboy T5 i only use 2 and not 6 i can use 4 or all 6 but i think its way to hot my question is...is this a good light for my chili's
ceaserelizondo I don’t think just 2 ho T5 is enough for chilly’s. 4 is more like it. Could use 2 for young veg
@@GrowingAnswers thank you so much
Excellent video thank sir, very helpful.
kind of a loaded question bro, I'd say a ceramic metal halide is considered the most influenced primary, closest to natural sunlight, but to understand photosynthesis, my best answers would be all of above spectrum, red,blue,white,orange,violet,and last 2 weeks ultra violet
Very informative, but i don't understand one thing tho. Like you said the white led light is full spectrum, but are 5000-5400 kelvin lights not used in studio's for photography and not suitable for growing plants? You'd need cool white (6500k) and warm white(2700k) and you have blue and red spectrums, right?
That light is actually 6000k. It's fine for vegging. You need a certain ratio of red to blue to flower/fruit. You don't need 2 different lights for the growth process. You can use one or a set of 3000-3500k lights or even 4000k to have that ratio. However, the grow test is to provide more info than just a simple yes or no answer.
Switching lights is usually done to try to squeeze the most out of what you are growing. It's not required.
I must be overthinking this; can you summarize, I've watched all 3 vids thus far. The white light that you're testing is 6000k, which showed better results (via vid 2). But in the post above you stated "you don't need 2 lights for growth process, you need 6500k AND 2700K"; isn't that 2 lights? Or more simply are you saying that this one 6000k 50watt light supplies all of it and can do both veg and flower with it? My mind is spinning from reading and watching too many contradicting studies, but your video 2 results seem the clearest to me, so thanks for that!
Sarah Longenecker well the light demonstrated in part 1 is 6000k. The light used in part 2 is 3000k. 6000k is great for veg. 3000-3500k can be used for the whole process. The only reason you would use a light for veg and a light for flower is to get a plant larger during veg and keep it growing more leaves without triggering flowering. Depends on if a plant has a photoperiod though. Switching lights during phases is an attempt to get the best you can get or simply put, to control growth.
Ah, I completely missed that it was a different light; thanks for clearing that up! I looked on amazon for this light and I can only find the 6000k, do you have a link to the 3000k? Have you done a growth compare between 6000k white vs 3000k white? When is video 4 coming out, can't wait? Any experience with this light, www.amazon.com/gp/product/B01HI3AFYM/ref=crt_ewc_title_dp_6?ie=UTF8&psc=1&smid=A2L94QV6P0R9ON ? Thank You!
Sarah Longenecker that light seems great for the price. It should easily outperform 2 of the same 3000k light I used . It's actually draw is 124 watts, not 300. Part 4 should be out in the next few weeks. Some people might say those brands of lights are crap, but for the price, it's perfect for a general hobbyist. Heck, the pink light I used in the video was $70.
Also there really is no real good reason to compare a 3000k to a 6000k. lights that favor the blue spectrum are good for plants that are leafy greens, but you can use both for veg. You wouldn't use a 6000k for flower or fruiting though. It would suppress the production of auxin and reduce the amount of flowering. However, a 3000k won't hinder the veg state, it more or less just allows the plant to put some energy into flowers intend of all of it into leaves. While the sun changes its shades over the season depending how much atmosphere it's filtered through, we don't change the sun to manipulate plants. Many plants will produce during peak summer while the sun is 4000-5000k. However, the color temperature changes during sunrise and sunset and through the day during its transition to and from its peak. At no time is the sun just blue though, so using 6000k or higher really is just to suppress flowering. Otherwise outside it would just flower if it doesn't have a photoperiod.
Дак, что, в леруашке какие прожекторы брать?
Cant wait to see the part 2
ruclips.net/video/HawgP5SXPko/видео.html
very nice detail explanation
I’ve made the biggest mistake going.two crops messed up.i bought some 660 full spectrum lights and stuck them on full power.little did I know my plants wasn’t getting full spectrum but on the lower setting it was.my plants at first looked 100% but soon were showing signs nitrogen toxicity so I thought I had a ph problem.no,no,no.it was the spectrum.
What wattage is needed from a red/blue LED light to get a PAR of 700 -1500? Does the Sun put out a flat light wave levels across the entire spectrum? Since the PAR meter are only measures 400nm - 700nm then the PAR number you get is the addition of blue, green, and red wavelengths.
+sodaman2006 If you mean without passing through the earths atmosphere the suns spectrum looks like this sciencequestionswithsurprisinganswers.org/images/sunlight_wavelength.png
+Simple Logic Thanks for the post. I found that going through the atmosphere it is reduced. If it wasn't for that fact we would'nt be able to grow anything outside.
www.calpoly.edu/~rfield/Thermalstructure_files/image002.gif
sodaman2006 Yes, afaik the overall intensity is reduced along with alot of the black light, aswell as most of the UV, and some of the IR. Leaving us with a spectrum that looks like this www.fondriest.com/environmental-measurements/wp-content/uploads/2014/03/par_solar-radiation.jpg
But the spectrum on earth changes with where on earth you measure it, and at what time of year, and what time of day.
Generally those changes are measured in Kelvin www.d.umn.edu/~mharvey/tempbar.jpg
sodaman2006 The sun does funny things too like bursts of far red right before sundown. It has shown to shorten the flowering cycle.
sodaman2006 The sun does funny things too like bursts of far red right before sundown. It has shown to shorten the flowering cycle.
There is a study saying green and infared is important in helping plant growth as well as uvb
Good work bro thanks alot
with zoomable focus lenses on led spotlights like used on led torches you could focus the light beam on just the flowers using adjustable lenses
Accessory pigments and trace minerals... both are necessary for the plant's maximum potential... and nutritional content
Stupid question but....who's that music at the beginning of the video ?
Lol, I probably should have noted that. I have no idea.
...lol !!!!!
thanks brother.
What kind of Mic are you using?
Audio-Technica ATR3350
well done & explained .
lol this was my first video i watched of you lol and i liked it so ill watch all your videos allthoe just me wont make much a differnce
when is part 2 coming?! I needs it
Shouldn't be too much longer. No spoilers, but I'm a bit surprised so far.
+OrionA51 goddamn it, you've given me no choice but to subscribe
ruclips.net/video/RuhiFe3WcQ0/видео.html
Part 2 is linked in this video description also
I grew plants in the past on Infrareds only bathroom lights it's around 700nm u can see it but its allot of heat I got a lb off 1100 watt off it.
Fabulous series, thank you
Would a mixture of cool white, 6000 - 6500 K, warm white, 2800 - 3200K and natural white 400 - 4500K be a satisfactory full spectrum lighting system for grow lights?
Geoffrey Terry aquarium lights use this technique by mixing various color temperature of whites, but the results would not be dramatically different for plants. 3500k is all you really need for general growth.
Hola amigo la verdad muy bueno pero mucho no pude entender.. podrias traducirlo? desde ya muchas gracias y muy buen trabajo. saludos desde argentina
Question you used normal white flood led light?
Baltazar Martinez Galla yes
@@GrowingAnswers thanks. Will start check on that soon
I'm on a low budget. I just was given a 400 watt MH bulb that used to hang in a wal mart. I'm gonna retro fit it for my veg room. I wonder what cannabis would do if flowered under MH?
On a different note, I've been getting good results from an array of 100w equivalent Sylvania LED home lights. Remove the plastic diffuser and there are up to 17 tiny lights. I have about 30 in an array atm. They work well. I need more of them though. This is a DIY thing I learned from Grass City
You’ll get flowers under MH, but just less yield
@@GrowingAnswers what if I supplement warm light, in equivalent amounts with led's? sounds janky but it's all I have.
Since it's winter I don't have too much problems with heat created by bulbs/ballasts etc , but come summer I will have to use only LEDs.
Rodney Daub any additional red light will help
man dont stuck when you talk you are doing well you hellped a lot ty man indeed i need this help for mj seeds :D but look it frome the good side of educational porpose keep the good work up ty again!
Could you please make a video with upside down lighting?
I would suggest to use about 5x 1 feets of cheap ribbon LED found on Ebay. Lay them just above soil, LED facing up.
Once the plant has grow one feet, add a second layer of ribbon LED, 10 cm above the soil, LED facing down.
Once the plant has grow again, add a third layer of ribbon, 10 cm above soil, LED facing up.
My hypothesis is that the plant will grow bushier sice it doesn't have to cover distance to get the best illumination.
which lights are better warm White led or the bright light led
Dale Gooding 3500k-4000k for general purpose growing
Nice information
part two please. lol you can always make a part 3. :D
at least let me know what the optimum distance from the white led is. i know the red/blue is 12 to 24 inches depending on the wattage, but i don't know about the white leds.
+xephorce part 2 is coming soon. The experiment is almost done. In my opinion, 12 inches works fine. I haven't noticed any issues being closer either. At least for a short time.
ok thanks i am worried about light burn from white leds being to close.
About 5 inches from the white led will work, but 12 inches is fine for veg stuff.
ruclips.net/video/HawgP5SXPko/видео.html
great vid man.
my grow light says 600watt but i check the power draw around 60 watt what happen?
Misleading marketing
can we use led red + blue for herbs,.
Sure can.
thank you
@@GrowingAnswers
Good explanation
Blurple led will give you magnesium issues go full spectrum 3200k flower 4200k for veg
Better yet cmh offers far red and far blue ir uv
Good I guess
Photosynthesis efficiency is pretty low. Around 2%. I wonder... is it more efficient to feed plants directly from sunlight or perhaps feed sunlight to PV then electricity to LED then optimized spectrum to plants. If the latter it makes no sense to grow things under sunlight instead of led or mh lamp.
Can u do a white and florescent light together
white Led is essentially a just a type of fluorescent light with a broader spectrum vs the glass tubes you refer to as fluorescent.
@@GrowingAnswers I mean the red/blue LEDs sitting next to a white led in the same tent but FS
@@ridzwing927 I’ve already done that in my newer videos
good info thanks
i am sorry i dont speak englis, what kelvin temperature of this white light?
Dênis Cechinel think it was 3000k
@@GrowingAnswers thankyou very much, i plant cannabis and i studied spectrometry and 4000k is perfect, or them, 3000k + 6000 up, thank you very much
@@brasilvirals hey, I am not sure whether to get a 3000k or 4000k led (supplementary for my balcony plants). Is there a large difference between the two ?
@@kurodesuuuu Hello, how are you?
yes there is a big difference
4000k led has a light spectrum suitable for plant growth.
If you don't have a 4000k one, you can use a 3000k one along with 6000k LED, as this will give you the full spectrum of light.
In relation to cannabis we have a vegetative and flowering stage, so it is a little more advanced, yet it is much easier than the internet, because companies try to make us believe that we need special super lamps.
See this picture.
i.ibb.co/f8bphVB/hjh.png
it has the spectra values specific to each color temperature.
see this other
http2.mlstatic.com/led-grow-profissional-samsung-4000k-veg-flora-cultivo-indoor-D_NQ_NP_886096-MLB29851249987_042019-F.jpg
this is the value on the graph you need, so comparing with the frequencies, for chlorophyll a and chlorophyll b, we get those values, a 4000k led or 3000k plus a 6000k led.
Thank you friend and a hug
@@brasilvirals Thank you so much!
I was getting really confused with all the grow light companies promoting the purple colored lights- this makes things much easier
Keep going on the good work
You forgot about the part where they burn out way quicker than they say they're supposed to.
Ok so what if I get regular red and blue bulbs will they grow plants or do I need LED's also what if i tint flourscent bulbs red and blue???????? anyone know the answere
John E watch part 4. Simple answer is, use white light. Led or fluorescent depending on your plant type. organisms that only require red/blue are types of algae. All plants use a broad spectrum. Not just red/blue.
Great info!
by far the best video series on the subject! Ryan you shouldn't worry about an occasional pothead with negative comments, especially ones who can't follow basic english likely due to Tetrahydrocannabinol induced brain damage.
hi
I have a tropical poted mid height plant its 1yr old plz gugest which light is best for flower and of how much watts
Harsha M you should use 2000k-3000k light, but more important than the light is the lighting hours depending on your plant
How do you avoid the red and blue light from damaging your eye?
No games Yes life blue/green color tinted sunglasses
Plants reflect green wave lenghts from the sun, making plants look green!
Michał Lassmann
Woooow really ??!
so instead of buying a normal powerful white led that will consume more energy and it will waste it on the yellow/green spectrum which will not make any difference to the plant , focusing that energy on a red/blue light will make far better results?
ToxiC BikEr you need to watch the other parts linked in the video description.
ToxiC BikEr r
so i can use normal white in auto plants
educational,
Thank you... very informative.. seems like a black science ..starting tomatoes early indoors. I have both lights.. ill share with u my results.. but thanks for sharing ur red spectrum..😁
Very well done, very good info. Just what i needed to know . I plan on building My own soon, and switching My Mars II's to C.O.B. chips. Thanks, respect.......Seven Thunders///////
Thanks! Grow test is still underway. So far it's inconclusive, but going well.