I found this over at Aussiepythons.com:"[BP's] prefer to sneak around in as dark as possible scenarios. Any visible light spectrum can be seen by a snake though including red and blue so if you want something for your viewing purposes then go for one of these colors. So I went out and bought a red lamp from Zoo Med that specifically said that it was "excellent for nocturnal viewing", along with a medium mouse and Deac (my Royal Python) gobbled him in a minute and I could see everything under the red light.