Led Types by Color, Brightness, and Chemistry (2021)
Posted2 months agoActiveabout 2 months ago
donklipstein.comTechstory
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Led TechnologyElectronicsOptoelectronics
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Led Technology
Electronics
Optoelectronics
A post categorizing LEDs by color, brightness, and chemistry, likely serving as a resource or reference for those interested in LED technology.
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Nov 3, 2025 at 12:55 PM EST
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I recognize that sRGB will never be able to do a perfect job, but it seems like it has to be possible to do decently well.
(What do I need this for? I design electronics. I use LEDs as indicators. I like to show the true color of the LED in my schematics and documentation, as best I can. And I try to never use the same color twice, in small and bespoke things, so there's less risk of indicator confusion, which means I've often got a lot of funny colors around.)
Using those in images however would be another can of worms, you'll need some kind of physics-based rendering with good HDR tone mapping, as the human perception of light-emitting object against reflective background is highly non-linear.
For your use case it would probably be better to develop a standardized testing setup and just take RGB or XYZ coordinates from an image taken with a calibrated camera. Something like this:
* "standard gray" material surface
* a hole for LED with some kind of light pipe of standard shape
* uniform diffuse lighting of intensity computed to be proportional to your LED power measured in a standard way.
In this way it should be possible to create a catalog of LEDs useful for designing products.
https://www.youtube.com/watch?v=AF8d72mA41M
We used some of this data to trace progress in LED development for our recent Nature Energy paper on technology spillovers in solid-state lighting: https://doi.org/g9kcjd.
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