Chuck Gould wrote:

in the pilothouse to better facilitate night vision. The red or blue
portions of the spectrum will provide adequate visibility without
destroying the ability of the eye to see clearly after dark.

Interesting subject.

Red is a good, but only at low wavelengths - around 600 millimicrons.
At higher wavelengths, it is virtually the same as white light.

Better is blue/green (teal) around 525 millimicrons.

If you need to see color, then very low intensity white light is
preferred. And if you need to keep your night vision, cover one
eye

Now the inevitable question is, why are instrument lights red?

They aren't - they are orange/red because of people who are
color blind.

HAH!!!