mynotaurus
@mynotaurus

curse you laws of physics for not making an LED zhat is me coloured


mynotaurus
@mynotaurus

seems like it might be kind of possible to hit my shades of purple at like 414nm but most of its UV at zhat point and might not even be visible


mynotaurus
@mynotaurus

haunted by diagrams zhat use purple to represent ultraviolet i zhink
cause surely itd just stop at blue, cause your red and green cone has no second peak at zhat point
i am being provided Contradictory Evidence >:(


SomeEgrets
@SomeEgrets

it is always valid to use phosphors to hit an emission band not achievable directly via a semiconductor band gap

but also hahaha trichromats can't even see UV...


mynotaurus
@mynotaurus

smh phosphors are cheating


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in reply to @mynotaurus's post:

but why do our eyes see it as purple zhen? if its just slightly tripping our "blue" cones and barely zhe "red" and "green", how does zhat make our brain go ah! purple, when i zhought zhat was a result of blue + red

when your blue cones are activated and your green aren't, you see violet
the ranges for green and blue cones overlap, a lot. you have to go pretty far up in energies before the green cones just stop picking any up...

405 nm is a common diode laser wavelength and is definitely visible as a kind of blurple. At eye safe power it's obviously a lot less visible than typical green or red lasers but still can be seen at closer range or dimmer background light.

"white leds" are either just 3 leds (bad) or an led that lights up a phosphor (good)
unless your fur glows it's subtractive color, which means you probably have two bands around blue and red. you can try looking into phosphors that give a proportional amount of light.

you could just get a red and a blue led but because that's not wide spectrum, you'll see the difference when you actually use it to light anything else around you, because other surfaces will interact with that precise spectrum and could end up reflecting way more or less light