Can You See the Red Light?

The frequencies of light do matter. Even an incandescent bulb will keep you awake, but normal incandescent bulbs are going to be better. In th old school incandescent bulbs, like the thomas edison style things, with a little filament, that's going to be better than an l d or a a florescent, white, blue light. But most people aren't ready to go there blacking out your windows a and then, yess whatever you're able to do....