No, it's all very true - but I don't think blue is the best colour. To retain night vision you need red light as it is the lowest frequency in the visible spectrum and has least effect on your eyes. When on board ship at night all cabin lights in the bridge / nav areas will be red so that night vision is no so baddly affected. That is also why you can sneak up on a lot of animals in the dark using a red torch, as many animals see using the higher blue/violet end of the spectrum. People like National Geographic used to use red light for night filming.
(Gordo - please do not do anything evil with this information).
__________________
"If first you don't succeed - skydiving is not for you."
|