this post was submitted on 27 Jan 2024
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[–] [email protected] 3 points 9 months ago (1 children)

Another thing that's curious about these lights which also applies to your computer/smartphone display aswell is the fact that it's able to produce yellow color despite only having red, green and blue leds in it. If you open up a yellow picture on your monitor and look closely with a magnifying glass there's no yellow there.

[–] [email protected] 1 points 9 months ago (2 children)

Thats another thing I don't get. Itf you look at your tv screen real close its all red/green/blue. Every pixel/cell, how does it appear different from far away

[–] [email protected] 4 points 9 months ago (2 children)

Okay you really want to fuck with your mind, brown is not a color. You can't not break down a rainbow and find brown anywhere in it. There is no such thing as brown light. Yet you can see it every day.

[–] [email protected] 1 points 9 months ago

Isn't pink generally the same phenomenon? Something about it being the "absence of green light" rather than its own distinct spot on the visible spectrum.

[–] [email protected] 1 points 9 months ago (1 children)

So how the heck is it rendered?

[–] [email protected] 2 points 9 months ago

If I am remembering correctly it is mostly just a crap shade of red.

This is a much better explanation than I can give

https://youtu.be/wh4aWZRtTwU?feature=shared

[–] [email protected] 3 points 9 months ago

Human eyes have three kinds of cells (photoreceptors) for color detection. They each react to either red, green or blue light. If more than one of those cells are activated, your brain interprets the light based on what cells activated, and how strongly they activated. If red and green cells activates, the light is seen as yellow. The light is seen as white if all of them activates fully.

This also means that light bulbs can produce white light by simply producing three wavelengths (colors) of light. The problem with that kind of “fake” white is that colors will look wrong under such light due to the way how objects reflects light. This is very common with low quality LED lights, and even the best smart lights aren't very good at it. When buying LED lights, you might want to look at the CRI (Color Rendering Index) value and make sure it's above 90, or as high as possible.