+Bram Swenson Thanks Bram! I really appreciate you taking the time to say that-I'm all about making videos that we can all understand. Fortunately they have to pass through the cognitive filter of my brain so it makes it fairly idiot-proof! :) Heheh.
Slightly deceiving when plants during fruit/flower need more red (HPS) then they do during Veg so while full spectrum is best, sometimes the values need to be adjusted for the situation.
A couple questions about lighting: 1. Do the reflectors need to be changed? How often? We are using 1000W Gavitas. 2. What happens as lights age? Intuitively I would guess intensity is reduced. But if so, and we are running at below max power (say 825W), what if we just bumped it up to 1000W? Or from 1000W to 1150W? Or does the PAR spectrum change/shift? 3. We change bulbs every year on a 12/12 cycle (about 4380 hours). Is that a good time? Are we wasting useful life? Thank you for your insight., and PS. Great videos overall - Fast, funny, and informative. Keep em coming! Mike
Hi Mike-thanks for your questions. 1. Yes. Recommended once per year or two years. 2. Spectrum changes when you dim or boost a lamp but, even more importantly, efficiency is lost when you dim a lamp. Lamp life or light maintenance is not greatly affected by boosting or dimming, specifically not if you use them for just one year. Lamps produce optimal efficiency at 100% or boosted, not when dimmed. You lose the red colors first during dimming. 3. Light maintenance of the Gavita lamps is 96% after 5000 hours. Average less than 2% loss the first year. Change them each year. Second year the losses will be 6%, so 4% more than the first year. It pays easily to change your lamps after one year of use. Hope this helps!
im going to use a small grow box,1m*1m for 2-3 plants. they have now 10cm height. how much distance should i put between light(CFL) and my plants? i mean the height
Hi. Just a heads up that Apogee Instruments (the company that makes the Sun Systems Par meter) just came out with the new MQ-500 Par meter in Feb. 2016 that has a lot better spectral response so it's better for measuring LEDs. Check out Apogee's website for more info.
Enjoyed your video. Thank you. Not many view so far. I guess lamps are not that interesting topic for most people, but quality and entertaining factor are definitely there in your videos.
What do you make of the following claim by AgroMax: "It is known that plants primarily use only a small portion of the visible light spectrum; primarily the Red and Blue spectrums, or 420-470nm (blue) and 620-670nm (red)" ?
Hey man! You got hps and led right... i see hps get even the lowets parts of the plant.. as if light just moving around.. with led i get a noticeable shadow right under any leaf.. any thoughts
did u get a chance to make PPFD and flux video? Ive bookmarked this and another video because they are informative and entertaining. thank you for your time!
Noted SpecialK my friend -- noted. Lots in the works and YPF is high on my agenda! Glad you're enjoying the vids and lots more to come! Peace out. Everest.
very educational as this guy is right on the money....par is simply intensity and has nothing to do with spectrum...spectrum is what grows plants to be at their peak as par will just bring on more yield as I've known it to be
I may have been into those 12 hour photo period plants tonight which is normal... But wow that sausage fest bit made me almost die laughing harder than I have in years. No joke, and that's hard! Had to rewind to the part with the bizzare freaks in the pool at least 5 times. My girlfriend got out of bed thinking I was balling. That was fuckin funny dude.
+Jason Tourangeau Heheheh - I enjoyed making this video too -- and its very satisfying to learn that it caused you so much mirth! Hope you're subbed - there aren't many photo-biological comedians on RUclips.... yet. Blazing a trail! :) have a good one amigo.
Grow Tacoma hey there... when I started I just got a vipar spectra.. knowing nothing about anything... now.. 1 crop later... I've been doing lots of research about canopy penetration and coverage... I've been looking a lot at the spectrum king and monster gardens videos... I have concluded my platinum lamps vover 2x 2 max in flower.. Max!! So I would need 4 total for a 4x4 area... that's too many leds and too much money... bit I would end up with an even coverage of about 1000 PAR at 18 inches... almost or even better than an HPS1000. I've been also analyzing the posibility to get spectrum king... but it's a fact an even coverage area would require several units... :)
Thanks for another awesome video! I have a question-whats your take on leaving plants in the dark for 24 hrs before the switch for flowering? Thanks a bunch for all your help.
+chandler seward Hey Chandler. That's a very interesting question. There is plenty of anecdotal talk on growers' forums about subjecting short-day photoperiodic plants to a 24 - 36 hour dark period in order to hasten the onset of transition into generative production (flowering and fruiting). The argument basically runs along the lines of the plants flip into flowering mode and leg up less, making them more efficient to light through the flowering period. I'd counter that it does indeed cause legginess as well as a host of other problems. So, my take? There's no need! A 12 hour, uninterrupted dark period is all that is required for short-day plants to accumulate sufficient florigen to stimulate flowering. That's what mother nature does-and I know of no commercial horticulturalists who employ a prolonged dark period to induce faster flowering. 36 hours of darkness would cause some stress and also excessive gibberilin and IAA production as the plant tries to grow upward rapidly to look for light! Excessive gibberilins can cause hermaphroditic expression in dioecious crops. A prolonged dark period invites spikes in humidity, which brings its own risks too. Also, a drier root zone helps to steer plants naturally towards flowering. But plants still use water when its dark, so you could return after 36 hours to find very thirsty plants. Hope this helps. I feel there's a video in here somewhere! Thanks for the inspiration! :)
+chandler seward No worries. There are plenty of growers who'd disagree with me on this. Some are adamant about this procedure-one guy even claimed that the prolonged dark period starves "light-harvesting bacterium" on the leaves which, in turn, helps them to adjust to a new "photonic diet" when switching from MH to HPS. (I'm not convinced by this explanation at all but hey, I'm always learning something new!) What I do know is this-with a prolonged dark period you are stressing your plants. And yes, plants will flower more quickly as a result of stress-but I'd rather they flowered because they were ready to and they were receiving the appropriate environmental signals, not because they of plant-apocalyptic fear! The morphological change from vegetative to fruit production brings enough stress of its own.
@@Just4Growers Howdy! Love your channel. I like to run my light cycle, for short day plants, for 24 hours with no dark cycle. After a week of this I then run 12/12. I find that this has quickened " the flip" to flowering. Keep up the good work!
specialk22tt Hi Specialk22tt. Thanks for your question. Sounds like a good blog entry for me! In the meantime, bear in mind that for non-photoperiodic species, it is possible to deliver their required light using less intense lighting over a longer photoperiod. The key metric for each species is DLI-or daily light integral-expressed in Mols-it's the total amount of light received in a 24 hour period. (goo.gl/ciFbRe) DLI is approximated as: average μmol reading x 3600 x hours of light per 24 hour period - all divided by a million to give you the value in Mol rather than μmol. Assuming all other environmental factors are optimal, Basil (sweet genovese) biomass production peaks at 500 μmol (Beaman, Gladon, Schrader (goo.gl/Oq4ryB)). 500 μmol is the maximum for basil! In fact, if it's easier to regulate your growing environment with 400 μmol then go with that. I recommend a 16 hour photoperiod for basil. So that's a DLI of 23 Mols. Lettuce, likes 16 hour days too, but prefers a DLI of 17. You can extrapolate the μmols with the following math - the reverse of the formula above - (17 x 1,000,000 [to convert mol to μmol] / 3600 / 16 = 295 μmol. Carrots are an interesting one! They LOVE full sun and lots of it! Kyei-Boahen, Lada, Astatkie, Gordon and Caldwell-researchers at Nova Scotia Ag College-performed some interesting experiments on carrots back in 2003. (goo.gl/lYACnc) Optimum lighting intensity differed between cultivars but I understand 600 μmol to be the peak. Finally, tomatoes and (sweet) peppers-a mature plant of either species generally requires a min DLI of 22 for good production. Some studies report tomato crops enjoy 30 mol (Dorais, 2003) to maximize yields. The same goes for sweet peppers-especially when planted densely where plant shading is more extensive. Again, how you deliver this DLI of 22 - 30 is up to you as neither tomatoes or peppers are photoperiodic (sensitive to day-length) so, theoretically you could deliver all the light your tomatoes / peppers need in 12 hours - you'd just need lighting between 509 and 694 μmol. Alternatively you could opt for an 18 hour day and possibly make your life easier: (340 - 463 μmol) - Hopefully you see how this works now but feel free to fire back any questions you may have. I hope you're subscribed to my channel! :)
Everest Fernandez One more thing SpecialK22tt. Although I said tomatoes are not photoperiodic (and I stand by that!) they do enjoy a dark period-so consider 18 hours of daylight your max. Don't be tempted to go for a 24 hour photoperiod and even less intense light. Give them at least a six hour rest per night. ;-)
Everest Fernandez You're the man Mt. Everest! I really appreciate ALL the great info. I'll spend some time, wrap my head around this info, read the links, and get back to you. Of course I'm subscribed - what fool wouldn't be...? ;)
Royal Poison You're welcome Royal Poison (formerly known as Prince Specialk) ;-) - Try the following Google (and Google Scholar) searches: [latin species name] DLI (μmol | mol | mols) e.g. Ocimum basilicum DLI (μmol | mol | mols) goo.gl/vEdSPU [latin species name] light requirements μmol e.g. Ocimum basilicum light requirements μmol goo.gl/78STXV Any more questions, you know where I am. Always happy to help and I genuinely appreciate each and every subscriber. Muchos gracias.
+R Sowmya Sure--you need two special and rather expensive pieces of equipment: an ulbricht sphere and a spectroradiometer. Put your light source inside the sphere (no reflector, just the lamp) and you can measure its PPF.
Yes, I will-been promising this for so long now-I've been waiting (and waiting) to jump into the LED world and choose a model that truly represents the state of the technology. We're at the point now where LEDs are finally able to provide a technical alternative, but they're still so expensive. Very exciting times.
the top one is only less because it's in the 500 which dosnt get used? if that 500 spike was in the 600 mark like the bottom one then the top would been more stronger, it's just the top spike is in the wasted zone for plants... i am correct? but u should of explained this dude, coz u make it a bit more complicated for someone who dosnt know the deal.. thanks for tha vid tho
Lex Luthor Thanks Lex. As intensity increases, spectrum becomes more important. We really have only just scratched the surface on this topic so I look forward to exploring deeper and then creating a new, awesome and efficient grow room for the next season of vids! :) Stay tuned, as they say! Thanks again for the feedback. Big love, Everest.
Steve Byers Thanks Steve. Just wait until we tackle PPFD, YPF and YPFD! It's already making my head gooey just thinking about it. The lighting videos are some of my favorites to make-thanks again for the positivity. Best wishes, Everest.
Photosynthetic flux is nothing more than the point at which light saturation is decreasing photosynthesis on a graph per with micromoles going up on the X axis and photosynthesis going down on the Y. So basically the point at which photosynthesis decreases due to too much light, right at the point where photosynthesis drops off is the flux.. Is not the same as PAR.
Britt Beats Photosynthetic photon flux (PPF) is actually the count of photons flowing (flux) from the light source. PPF has nothing to do with light saturation. Yes-PPF and PAR are exactly the same thing. I'm glad that you enjoyed the video. I hope you will consider subscribing to my channel. Thanks for watching!
Everest Fernandez I wouldn't know where to even start with questions, I'm looking at what would be better lighting to grow between HPS and LED that was complicated enough, then UV and photons and spectrums = my head spinning. When I know what question to ask I'll be asking haha
Sorry about that Bob. I've added english subtitles (real ones, not automatically generated) which may help - you can also reduce the playback speed if you're watching on a desktop computer by clicking on the 'cog' icon in the bottom right of the playback area.
Fantastic video with a great explanation of PAR that anyone should be able to comprehend. Great work Everest!
+Bram Swenson Thanks Bram! I really appreciate you taking the time to say that-I'm all about making videos that we can all understand. Fortunately they have to pass through the cognitive filter of my brain so it makes it fairly idiot-proof! :) Heheh.
I'm in my first grow right now and you just taught me more than any other video about the par and importance of as well! SUBBED
Subscribed! Can’t wait to see your other videos, this one was to the point and didn’t put me to sleep.
Slightly deceiving when plants during fruit/flower need more red (HPS) then they do during Veg so while full spectrum is best, sometimes the values need to be adjusted for the situation.
A couple questions about lighting:
1. Do the reflectors need to be changed? How often? We are using 1000W Gavitas.
2. What happens as lights age? Intuitively I would guess intensity is reduced. But if so, and we are running at below max power (say 825W), what if we just bumped it up to 1000W? Or from 1000W to 1150W? Or does the PAR spectrum change/shift?
3. We change bulbs every year on a 12/12 cycle (about 4380 hours). Is that a good time? Are we wasting useful life?
Thank you for your insight., and PS. Great videos overall - Fast, funny, and informative. Keep em coming!
Mike
Hi Mike-thanks for your questions.
1. Yes. Recommended once per year or two years.
2. Spectrum changes when you dim or boost a lamp but, even more importantly, efficiency is lost when you dim a lamp. Lamp life or light maintenance is not greatly affected by boosting or dimming, specifically not if you use them for just one year. Lamps produce optimal efficiency at 100% or boosted, not when dimmed. You lose the red colors first during dimming.
3. Light maintenance of the Gavita lamps is 96% after 5000 hours. Average less than 2% loss the first year. Change them each year. Second year the losses will be 6%, so 4% more than the first year. It pays easily to change your lamps after one year of use.
Hope this helps!
im going to use a small grow box,1m*1m for 2-3 plants. they have now 10cm height. how much distance should i put between light(CFL) and my plants? i mean the height
you have made me laugh and learn at the same time, awesome!
Hi. Just a heads up that Apogee Instruments (the company that makes the Sun Systems Par meter) just came out with the new MQ-500 Par meter in Feb. 2016 that has a lot better spectral response so it's better for measuring LEDs. Check out Apogee's website for more info.
Enjoyed your video. Thank you. Not many view so far. I guess lamps are not that interesting topic for most people, but quality and entertaining factor are definitely there in your videos.
Jkep Ihanc Thanks Jkep. It's a fairly new video (and channel) so time will tell. Good feedback (like yours) so far - worth a million views to me! :)
You sounded great. Perfect presentation.
Randy Marsh Awesome. I'm glad you detected that I was mindful of your feedback! Thanks again.
What do you make of the following claim by AgroMax: "It is known that plants primarily use only a small portion of the visible light spectrum; primarily the Red and Blue spectrums, or 420-470nm (blue) and 620-670nm (red)" ?
Hey man! You got hps and led right... i see hps get even the lowets parts of the plant.. as if light just moving around.. with led i get a noticeable shadow right under any leaf.. any thoughts
I don't think i ever hit subscribe faster than this
+Shrek GreenMan Thanks so much Shrek! It means a LOT to me that you subbed. I appreciate each and every one! Thanks again.
did u get a chance to make PPFD and flux video? Ive bookmarked this and another video because they are informative and entertaining. thank you for your time!
Dude! Get that YPF up!
Great vids. Well done. Keep them coming.
Noted SpecialK my friend -- noted. Lots in the works and YPF is high on my agenda! Glad you're enjoying the vids and lots more to come! Peace out. Everest.
great video. very well and easliy explained
Thanks Forrest.
Brilliant video. I hope you teach...
very educational as this guy is right on the money....par is simply intensity and has nothing to do with spectrum...spectrum is what grows plants to be at their peak as par will just bring on more yield as I've known it to be
Thanks Mike, please consider subscribing to my channel-thanks again for your kind words. Peace and happy growing, Everest.
I got a 19w led from Home Depot I’m good right?
I may have been into those 12 hour photo period plants tonight which is normal... But wow that sausage fest bit made me almost die laughing harder than I have in years. No joke, and that's hard!
Had to rewind to the part with the bizzare freaks in the pool at least 5 times. My girlfriend got out of bed thinking I was balling. That was fuckin funny dude.
+Jason Tourangeau Heheheh - I enjoyed making this video too -- and its very satisfying to learn that it caused you so much mirth! Hope you're subbed - there aren't many photo-biological comedians on RUclips.... yet. Blazing a trail! :) have a good one amigo.
Grow Tacoma hey there... when I started I just got a vipar spectra.. knowing nothing about anything... now.. 1 crop later... I've been doing lots of research about canopy penetration and coverage... I've been looking a lot at the spectrum king and monster gardens videos... I have concluded my platinum lamps vover 2x 2 max in flower.. Max!! So I would need 4 total for a 4x4 area... that's too many leds and too much money... bit I would end up with an even coverage of about 1000 PAR at 18 inches... almost or even better than an HPS1000.
I've been also analyzing the posibility to get spectrum king... but it's a fact an even coverage area would require several units... :)
Greeting sir! I am currently working on the automation of a rice indoor grower. Is there anyways I can connect with you? Thank you!!
I understood that , now time for a nap.
Thanks for another awesome video! I have a question-whats your take on leaving plants in the dark for 24 hrs before the switch for flowering? Thanks a bunch for all your help.
+chandler seward Hey Chandler. That's a very interesting question. There is plenty of anecdotal talk on growers' forums about subjecting short-day photoperiodic plants to a 24 - 36 hour dark period in order to hasten the onset of transition into generative production (flowering and fruiting). The argument basically runs along the lines of the plants flip into flowering mode and leg up less, making them more efficient to light through the flowering period. I'd counter that it does indeed cause legginess as well as a host of other problems.
So, my take? There's no need! A 12 hour, uninterrupted dark period is all that is required for short-day plants to accumulate sufficient florigen to stimulate flowering. That's what mother nature does-and I know of no commercial horticulturalists who employ a prolonged dark period to induce faster flowering. 36 hours of darkness would cause some stress and also excessive gibberilin and IAA production as the plant tries to grow upward rapidly to look for light! Excessive gibberilins can cause hermaphroditic expression in dioecious crops. A prolonged dark period invites spikes in humidity, which brings its own risks too. Also, a drier root zone helps to steer plants naturally towards flowering. But plants still use water when its dark, so you could return after 36 hours to find very thirsty plants.
Hope this helps. I feel there's a video in here somewhere! Thanks for the inspiration! :)
Rad. That's what I was thinking/feeling. Thanks again.
+chandler seward No worries. There are plenty of growers who'd disagree with me on this. Some are adamant about this procedure-one guy even claimed that the prolonged dark period starves "light-harvesting bacterium" on the leaves which, in turn, helps them to adjust to a new "photonic diet" when switching from MH to HPS. (I'm not convinced by this explanation at all but hey, I'm always learning something new!) What I do know is this-with a prolonged dark period you are stressing your plants. And yes, plants will flower more quickly as a result of stress-but I'd rather they flowered because they were ready to and they were receiving the appropriate environmental signals, not because they of plant-apocalyptic fear! The morphological change from vegetative to fruit production brings enough stress of its own.
@@Just4Growers Howdy! Love your channel. I like to run my light cycle, for short day plants, for 24 hours with no dark cycle. After a week of this I then run 12/12. I find that this has quickened " the flip" to flowering. Keep up the good work!
I've been learning so much from watching your videos. Love your respect for growing and hyper-activeness! By any chance are you an engineer?
Also, Have you heard of Spectrum King? Just bought their 140W Closet Grow light.
+Zachary Taylor Thanks Zachary. I am a software engineer graduate - maybe the geekiness comes through a bit? Lol.
Everest Fernandez Just a bit, but it's appreciated!
Do you have any good sources on mmol requirements for MANY different herbs & vegetables (i.e. basil, lettuces, carrots, peppers, etc)?
specialk22tt Hi Specialk22tt. Thanks for your question. Sounds like a good blog entry for me! In the meantime, bear in mind that for non-photoperiodic species, it is possible to deliver their required light using less intense lighting over a longer photoperiod. The key metric for each species is DLI-or daily light integral-expressed in Mols-it's the total amount of light received in a 24 hour period. (goo.gl/ciFbRe) DLI is approximated as: average μmol reading x 3600 x hours of light per 24 hour period - all divided by a million to give you the value in Mol rather than μmol.
Assuming all other environmental factors are optimal, Basil (sweet genovese) biomass production peaks at 500 μmol (Beaman, Gladon, Schrader (goo.gl/Oq4ryB)). 500 μmol is the maximum for basil! In fact, if it's easier to regulate your growing environment with 400 μmol then go with that. I recommend a 16 hour photoperiod for basil. So that's a DLI of 23 Mols. Lettuce, likes 16 hour days too, but prefers a DLI of 17. You can extrapolate the μmols with the following math - the reverse of the formula above - (17 x 1,000,000 [to convert mol to μmol] / 3600 / 16 = 295 μmol.
Carrots are an interesting one! They LOVE full sun and lots of it! Kyei-Boahen, Lada, Astatkie, Gordon and Caldwell-researchers at Nova Scotia Ag College-performed some interesting experiments on carrots back in 2003. (goo.gl/lYACnc) Optimum lighting intensity differed between cultivars but I understand 600 μmol to be the peak.
Finally, tomatoes and (sweet) peppers-a mature plant of either species generally requires a min DLI of 22 for good production. Some studies report tomato crops enjoy 30 mol (Dorais, 2003) to maximize yields. The same goes for sweet peppers-especially when planted densely where plant shading is more extensive. Again, how you deliver this DLI of 22 - 30 is up to you as neither tomatoes or peppers are photoperiodic (sensitive to day-length) so, theoretically you could deliver all the light your tomatoes / peppers need in 12 hours - you'd just need lighting between 509 and 694 μmol. Alternatively you could opt for an 18 hour day and possibly make your life easier: (340 - 463 μmol) - Hopefully you see how this works now but feel free to fire back any questions you may have. I hope you're subscribed to my channel! :)
Everest Fernandez One more thing SpecialK22tt. Although I said tomatoes are not photoperiodic (and I stand by that!) they do enjoy a dark period-so consider 18 hours of daylight your max. Don't be tempted to go for a 24 hour photoperiod and even less intense light. Give them at least a six hour rest per night. ;-)
Everest Fernandez You're the man Mt. Everest! I really appreciate ALL the great info. I'll spend some time, wrap my head around this info, read the links, and get back to you.
Of course I'm subscribed - what fool wouldn't be...? ;)
Royal Poison You're welcome Royal Poison (formerly known as Prince Specialk) ;-) - Try the following Google (and Google Scholar) searches:
[latin species name] DLI (μmol | mol | mols) e.g. Ocimum basilicum DLI (μmol | mol | mols) goo.gl/vEdSPU
[latin species name] light requirements μmol e.g. Ocimum basilicum light requirements μmol goo.gl/78STXV
Any more questions, you know where I am. Always happy to help and I genuinely appreciate each and every subscriber. Muchos gracias.
How about led grow lights Everest? Can you make a video please
+francisco sanchez Hey Francisco the time has almost come! I've got all sorts of LED treats for you.
Thank you so much for the info. Best!
can you explain how to calculate PPF of a light source
+R Sowmya Sure--you need two special and rather expensive pieces of equipment: an ulbricht sphere and a spectroradiometer. Put your light source inside the sphere (no reflector, just the lamp) and you can measure its PPF.
Thx for video, very good
can you do videos on led lights?
Yes, I will-been promising this for so long now-I've been waiting (and waiting) to jump into the LED world and choose a model that truly represents the state of the technology. We're at the point now where LEDs are finally able to provide a technical alternative, but they're still so expensive. Very exciting times.
Uh oh! Sausagefest! 😂
That shit cracked me up.
Great fkn vid man!
Mainely Cannabis When it comes to finding the motivation to keep making videos, comments like these are like manna for my soul. Thank you amigo.
Love these vids
Thank you Aldo!
Photons of love sent, via hitting that subscibe button!
the top one is only less because it's in the 500 which dosnt get used? if that 500 spike was in the 600 mark like the bottom one then the top would been more stronger, it's just the top spike is in the wasted zone for plants... i am correct? but u should of explained this dude, coz u make it a bit more complicated for someone who dosnt know the deal.. thanks for tha vid tho
u rock dude... friendly hello chile
Thanks Edir!
+Everest Fernandez (Just4Growers) And from Russian growers hello to! )
LASERMASTERS привет моим собратьям в прекрасной России!
Everest Fernandez Спасибо брат! ✌😀
Hows the cannabis growing?
awesommmm vid
Great video. Misinformation everywhere and a lot of people fall for the trap.
Lex Luthor Thanks Lex. As intensity increases, spectrum becomes more important. We really have only just scratched the surface on this topic so I look forward to exploring deeper and then creating a new, awesome and efficient grow room for the next season of vids! :) Stay tuned, as they say! Thanks again for the feedback. Big love, Everest.
Lex Luthor please elaborate
very informative^^
Thanks!
Holy...sh*t just got serious..lol Great vid!
Steve Byers Thanks Steve. Just wait until we tackle PPFD, YPF and YPFD! It's already making my head gooey just thinking about it. The lighting videos are some of my favorites to make-thanks again for the positivity. Best wishes, Everest.
Par numbers are a new way to sell lights
next can we see u do a vid on lux and candle watts . and the range of light to grow the best vegys. I know light =s wait.
Thanks SF420, I'll look into that :)
Photosynthetic flux is nothing more than the point at which light saturation is decreasing photosynthesis on a graph per with micromoles going up on the X axis and photosynthesis going down on the Y. So basically the point at which photosynthesis decreases due to too much light, right at the point where photosynthesis drops off is the flux.. Is not the same as PAR.
Britt Beats Photosynthetic photon flux (PPF) is actually the count of photons flowing (flux) from the light source. PPF has nothing to do with light saturation. Yes-PPF and PAR are exactly the same thing. I'm glad that you enjoyed the video. I hope you will consider subscribing to my channel. Thanks for watching!
so LEC compared to regular halide?
+mathew freistadt LEC is more efficient, better spectral distribution, much longer PAR-maintenance (effective lamp life) and, of course, incredible plant response. :)
Everest Fernandez thank you. can't wait to setup my LEC 315
+mathew freistadt You'll love it. I'm particularly fond of the vertical lamp position in this fixture. Perfect for producing vigorous young plants.
Turn it up to 1.5 speed
Whoooooosh, over my head lol
+ManyHands92 hit me up with any q's
Everest Fernandez I wouldn't know where to even start with questions, I'm looking at what would be better lighting to grow between HPS and LED that was complicated enough, then UV and photons and spectrums = my head spinning. When I know what question to ask I'll be asking haha
Fast cuts are killing me any channel for indoor growers without adhd lol
Ypf video???
doliver358 I hear you :) I will definitely discuss light in more depth very soon and incorporate the difference between YPF and PPF :)
Man there is nothing like the sun...
Romo Jack You got that right Romo! :)
This video has less views then subscriptions... That means half your subscribers don’t like the video?
They haven’t even seen it to know that they dislike it.... :( so heartless.....
Good information, but god the child-talk is cringy.
ads put me to sleep
If sleep is not your aim then try RUclips Premium.
gimp everest on that par light lmao
Kelvins
Growing inside but no marijuana.. weird lol
Uh oh sausage fest!
Sausage fest!!!!!!!!!!!!!!hahahahahaha
Talking way too fast
Sorry about that Bob. I've added english subtitles (real ones, not automatically generated) which may help - you can also reduce the playback speed if you're watching on a desktop computer by clicking on the 'cog' icon in the bottom right of the playback area.