[Paddlewise] Night Vision

There was a thread on Paddlewise a while ago about the
effects of different-colored lighting on night vision.
Recently I stumbled across the following article, "Seeing
Red," which has quite a bit to say on the subject:
http://www.corvus.com/kniffen.htm.

The gist of the article, published by the American
Association of Amateur Astronomers, is that light
intensity, not color, affects night vision most, and that
green light is superior to red light because green light
does not have to be as bright as red to read charts and
instruments. Green also makes many chart colors easier
to see.

I've been trying to figure out how to illuminate our deck
compasses for night navigation. Looks like green LEDs
might be the way to go.

Chuck Holst


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