Only way you will really stress them lightwise is if you run a bright light and offer no hides as well as leaving the light on 24/7. And yes I believe it the blue and reds that simulate the moonlight/darkness. I personally just use the room lights as well my beardies 1 million heat lamps and UVB tubes to give off enough light for my snakes. Although I have been curious about http://www.reptilebasics.com/led-cag.../42-led-light/ for my girls.