i dunno why red is shunned, it's the most efficient for the lumens and 620nm was the original LED... i have a pair of USB 5v powered led strips as my primary lightning in my downstairs area

green, ok, green is ok, it's just very fucking bright, but blue, hasn't anyone received the memo about how the most common pure blue emitter is exactly a frequency that has been found to disrupt circadian rhythms?

and most "white" LEDs and amber types tend to also be actually UV with phosphors and these are nasty as well... there is two types of LED i approve of - the pure frequency red and green, and quantum dot OLEDs, which have an almost perfect flat spectral curve

otherwise, give me neon orange old school illuminators or incandescent tungsten with or without the halides

especially if the device is AC powered, old school orange neon is the classic standard of indicator lamp, there is no actual reason why to not use them

whoever these cunts are that think we want blue LED indicators in devices that we might want to sleep next to, needs to be slapped upside the head