Yes, you are right that you don't perceive a bluish hue at 5000k, just a very stark pure white. My intent was to say that as the color temperature (CCT to be more correct) increases, there is more blue content and less of a yellowish appearance (to explain the idea of "warm" vs. "cool" - it's a little counter intuitive that "cool" should correspond to a HIGHER color temperature!).
Since LEDs first came out the color names were 2700 Warm White, 3500 Bright White, and 6500 Daylight. The confusing part is when companies come up with their own names for the color difference. This video helped explain them. I just hope the LED color names stay the same so buying replacements is easier.
Thanks for that. A very helpful and informative video. Really well shot too... ive been looking for a vid that shows and explains the difference between kelvins, this video is by far the best I've seen so far on the net.
Great video. I have recessed lights in kitchen. Is Clean white the same as bright white. I did purchase Feit Electric brand, 3000K, bright white, 450 lumens. I have not yet installed. Still trying to figure how to on that. Thanks.
"Unlike the degree Fahrenheit and degree Celsius, the kelvin is not referred to or typeset as a degree. The kelvin is the primary unit of measurement in the physical sciences..."
Using cfl's with around 5500k color temperature, causes vitamin D synthesis in the body. Good for shools/office building space. Boost productivity of worker and health.
Great explanation. Thanks. Also for lighting involving traffic, cooler color temperatures provide greater contrast between area lighting and brake lights, turn signals and traffic signals and produce improved driver recognition. For commercial applications, cooler ambient lighting can often cause contrasting illuminated signage to better "pop" while warmer general interior lighting is often more pleasing. Considering application and purpose as it relates to lighting temperature choices can produce the best results for your lighting investment.
Why is it that sunlight is 5600K and looks normal to my eye (maybe even warm!).. but 4000K is the bluest white for lights? Has it got something to do with mesopic vision being used at the time we would generally switch on a light??
Think of it as the way daylight looks when you step outside from a dim room vs daylight once you've had time to adjust. Lights that contain red, blue, and green LEDs working together to recreate light temps behind a filter do a better job replicating daylight imo
LED is the FUTURE ! I am using small LED Clearance Lights for Rear Signal Lights on my ILTIS (avatar). They are less than 3watts, but are as Bright as an 1156 bulb (27 watts)
Hey bro i want to install 10 pcs led tune light in 11×24 feet medical store. i want to keep it neutral day white 4000k. Will it be sufficient to light up the whole space. Or i should go with 18pcs 12w led panels. Which will light up the area best ? pls reply
The issue is none of the box stores sell a 4000k bulb. Your choice are 2700k, 3000k or 5000k. I personally don't like the 2700k or the 3000k, but the 5000k can be too stark in some applications.
I have a question that you may or may not be able to answer. With LED lighting, the digital camera I have doesn't white balance well. Meaning, the image is way overexposed and some areas that are light to the eye are in the shadows in the image. What temperature LED lighting is best for digital cameras to properly white balance to set proper exposures?
Get a grey card and set it to auto white balance, take the shot, then go to the menu and set white balance to custom then select the image with the grey card and set it to custom then it should be accurate. Hopefully I explained that okay 🤣 it's easier to show it then to explain it.
Lighting food nicely means choosing the right combination of color temperature (CCT) and color rendering (CRI). And it depends on the food ... I might light red meat differently than green vegetables. In both cases you would want high CRI full spectrum lighting, but with meat you'd need especially good red (R9). I would probably choose 3000K color temperature, and not beyond 4000K. Some companies make meat display lights that emit pink light, but I think it makes the display look a bit strange. I'd rather have full spectrum white light.
Thank you very much for this informative video! One thing I'm wondering. Is colour temperature absolute? I mean if you have a led light from manufactor A which states 4000 K and then a led light from manufactor B which states 4000 K is it going to be the same colour? From my experience this is not the case, but should it be so?
4300k is the color temperature that automobile manufacturers normally select for their cars headlights as it generates the most visibility on the road.
I just want an LED that mimics my 40W & 60W Soft White old light bulbs. I tried the "day light" bulbs of yesteryear and returned them quickly. Although the day light bulbs made all the colors in the room pop, it gave me a headache when reading. So I guess a 40W 3000K or below is good for reading for me. I don't think they call LEDs "soft white" but if they do I'll try them. It sound like those 5000K lights are "day light".
Turns out common LED bulbs have only a yellow broadband light source (cerium YAG), and cooler ones get a variable amount of blue mixed in with a spectral gap, as if there were two lamps in one package. Because of that, a 4000k rated bulb already looks bluish, and more artificial.
This is a little misleading. My company, State Of The Art Electric, installs 5000K LEDs and they are very white, not blue. The blue does't appear until about 6500K, called full spectrum lighting, that matches natural sunlight, and are used in photographic shops etc. Also kelvin rating is not always exact. For example when we install 4 foot lights such as is used in offices, we install 6500K CFL lights and some LEDs, because they are a little less blue. Basically, it is not an exact science :)
I really appreciate when people take the time and effort to make good demonstration videos. Thanks!
This was WAY better than I thought it was going to be.
Great job!
Good knowledgeable information. I appreciate you taking the time to make this video.
1:41 Warm white (2700K). LED on the left, halogen on the right.
2:14 Clean white (3000K). LED only.
2:49 Natural white (4000K). LED only.
Yes, you are right that you don't perceive a bluish hue at 5000k, just a very stark pure white. My intent was to say that as the color temperature (CCT to be more correct) increases, there is more blue content and less of a yellowish appearance (to explain the idea of "warm" vs. "cool" - it's a little counter intuitive that "cool" should correspond to a HIGHER color temperature!).
Since LEDs first came out the color names were 2700 Warm White, 3500 Bright White, and 6500 Daylight. The confusing part is when companies come up with their own names for the color difference. This video helped explain them. I just hope the LED color names stay the same so buying replacements is easier.
Thanks for that. A very helpful and informative video. Really well shot too... ive been looking for a vid that shows and explains the difference between kelvins, this video is by far the best I've seen so far on the net.
Best video I’ve found on this topic. Thank you.
Certainly informative!! Never seen kelvin on a lightbulb pack, but it does show a scale, from warm to cool. Thank u for doing a demonstration!!
Great video. I have recessed lights in kitchen. Is Clean white the same as bright white. I did purchase Feit Electric brand, 3000K, bright white, 450 lumens. I have not yet installed. Still trying to figure how to on that. Thanks.
Thanks! and yes, they are all dimmable.
"Unlike the degree Fahrenheit and degree Celsius, the kelvin is not referred to or typeset as a degree. The kelvin is the primary unit of measurement in the physical sciences..."
Using cfl's with around 5500k color temperature, causes vitamin D synthesis in the body. Good for shools/office building space. Boost productivity of worker and health.
3500K is the magic number for office or industrial settings. Anything below that and workers tend to be less productive
Great explanation. Thanks. Also for lighting involving traffic, cooler color temperatures provide greater contrast between area lighting and brake lights, turn signals and traffic signals and produce improved driver recognition. For commercial applications, cooler ambient lighting can often cause contrasting illuminated signage to better "pop" while warmer general interior lighting is often more pleasing. Considering application and purpose as it relates to lighting temperature choices can produce the best results for your lighting investment.
Question David: if the lamp says max 60 watt bulb, I can use a 15 watt LED that is a 100 watt equivalent, right? Thanks much!
Best video ever... I always wanted to know exactly what is being addressed.. lighting theory in a nutshell!
Thank you. Much easier to understand.
Thanks - this is a well-demonstrated explanation of colour temp - much appreciated!
4:40 Light colors --relative comparison (good)
An excellent explanation. Thank you.
you are very professional
Why is it that sunlight is 5600K and looks normal to my eye (maybe even warm!).. but 4000K is the bluest white for lights?
Has it got something to do with mesopic vision being used at the time we would generally switch on a light??
Think of it as the way daylight looks when you step outside from a dim room vs daylight once you've had time to adjust. Lights that contain red, blue, and green LEDs working together to recreate light temps behind a filter do a better job replicating daylight imo
If the bulb is being installed where the walls are a warm color such
as red then a lower color temp (warmer) should be used.
Or for home applications
This lamp includes three color (3000K,4000K and 6000K) and dimming with trailing edge dimmer: @4P9w
LED is the FUTURE ! I am using small LED Clearance Lights for Rear Signal Lights on my ILTIS (avatar). They are less than 3watts, but are as Bright as an 1156 bulb (27 watts)
Great video, explains it consisely and very well.
Hey bro i want to install 10 pcs led tune light in 11×24 feet medical store. i want to keep it neutral day white 4000k. Will it be sufficient to light up the whole space. Or i should go with 18pcs 12w led panels.
Which will light up the area best ?
pls reply
The issue is none of the box stores sell a 4000k bulb. Your choice are 2700k, 3000k or 5000k. I personally don't like the 2700k or the 3000k, but the 5000k can be too stark in some applications.
In my country 4000k and 5000k are not easy to find. Sometimes we only have a choice for 2700k, 3000k, or 6500k.
Perfect explanation... Just wulish I knew if it was dimmable...?
How would I go about to get a full spectrum white led?
Very Helpful, thank you!
I have a question that you may or may not be able to answer. With LED lighting, the digital camera I have doesn't white balance well. Meaning, the image is way overexposed and some areas that are light to the eye are in the shadows in the image. What temperature LED lighting is best for digital cameras to properly white balance to set proper exposures?
Get a grey card and set it to auto white balance, take the shot, then go to the menu and set white balance to custom then select the image with the grey card and set it to custom then it should be accurate. Hopefully I explained that okay 🤣 it's easier to show it then to explain it.
I get it...thanks a bunch. But what light makes food look the most natural?
Lighting food nicely means choosing the right combination of color temperature (CCT) and color rendering (CRI). And it depends on the food ... I might light red meat differently than green vegetables. In both cases you would want high CRI full spectrum lighting, but with meat you'd need especially good red (R9). I would probably choose 3000K color temperature, and not beyond 4000K. Some companies make meat display lights that emit pink light, but I think it makes the display look a bit strange. I'd rather have full spectrum white light.
@@lumicrest I have some pink light 40w fluoro tubes
The measurment of color by W.D. wright
3000K is the way to go!.
Thanks for the info !
the imperial equivilent of Kelvin is Rankine Degrees
Thanks for the info :)
Thank you very much for this informative video! One thing I'm wondering. Is colour temperature absolute? I mean if you have a led light from manufactor A which states 4000 K and then a led light from manufactor B which states 4000 K is it going to be the same colour?
From my experience this is not the case, but should it be so?
yes it should but as you say wont always be the case
When can we have LED's with continuously selectable colour temp.?? =-P
Good video!
Super video thanx
Yellow light seems to travel further than white light. Can you explain Why this is?
Thaq so much brother 😍
4300k is the color temperature that automobile manufacturers normally select for their cars headlights as it generates the most visibility on the road.
Great vid thanks
I just want an LED that mimics my 40W & 60W Soft White old light bulbs. I tried the "day light" bulbs
of yesteryear and returned them quickly. Although the day light bulbs made all the colors in the room pop, it gave me a headache when reading. So I guess a 40W 3000K or below is good for reading for me. I don't think they call LEDs "soft white" but if they do I'll try them. It sound like those 5000K lights are "day light".
Turns out common LED bulbs have only a yellow broadband light source (cerium YAG), and cooler ones get a variable amount of blue mixed in with a spectral gap, as if there were two lamps in one package. Because of that, a 4000k rated bulb already looks bluish, and more artificial.
Thanks!
This is a little misleading. My company, State Of The Art Electric, installs 5000K LEDs and they are very white, not blue. The blue does't appear until about 6500K, called full spectrum lighting, that matches natural sunlight, and are used in photographic shops etc. Also kelvin rating is not always exact. For example when we install 4 foot lights such as is used in offices, we install 6500K CFL lights and some LEDs, because they are a little less blue. Basically, it is not an exact science :)
**Thankyou**
interesting
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It is just Kelvin (K), not degrees Kelvin (°K)
Yes, I learned that after I made the video. Seems that's another example of a confusing little detail about lighting actually. Thanks
Why is the sound so low? Try using a microphone next time.
sound wasn't too low, but I hate super loud
There are no degrees of kelvin. ;)
plenty incorections
Please tell us all the plenty of things that are wrong!
Good topic. Poor explanation.