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Overall, I agree with you. Red lights are great for maintaining night-vision, but they're an extreme option. Color-blind people may also not get much use out of
by 1MachineElf 6y ago
Overall, I agree with you. Red lights are great for maintaining night-vision, but they're an extreme option. Color-blind people may also not get much use out of them.
- StrictDabbler 6y agoThat's not how color-blindness works. In classic deuteranomaly the red and green cone peak sensitivities are closer together so red and green light are perceived similarly. The red cones aren't gone and in low light you aren't even using your cones, you're using your more sensitive rods. Rods are inherently color-blind in all of us. What is useful about a red light is that it has very little blue. Blue light is what causes the iris to contract. So the ideal night lighting would be a brightish mix of red and green to give the rods lots of light to see with almost no blue in it to stimulate the blue cones and cause the eyes to contract... Oh hey! That's what the yellow color of sodium lighting does if there aren't a bunch of stupid SUVs with bright white projector lamps all over the road. Fancy that.