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From notes for an open source bowling alley: https://news.ycombinator.com/item?id=48971134 :

> Most flying insects cannot see red, orange or yellow light;

> Red preserves night vision. Blue keeps operators awake. Blue and white cause the worst glare. Jet instrument gauges are reddish/orange-ish.

This is plain obvious, I don't know why this isn't mainstream everywhere. The new cars with white lights are often blinding.

If you look at the spectrum of white LEDs they have a much higher blue light content than compared to other lighting technologies. Often it's an other peak in the spectrum.

Also a lot of street lights have been replaced with LEDs, although probably better than Sodium Vapor since that light source has pretty narrow spectrum.

Probably means we should all be using warmer LEDs, instead of like 5000K, 4000K ect... for night lighting.

Ive seen a truck with super yellow light addons and I have to say they were surprisingly horrible and hard to look at. Red and orange still seem okay but the yellow ones were just painful. But perhaps they were also broadcasting a bunch of white light too with it because ive only seen those style twice.