I've actually looked up studies on what light waves BPs can see, and it seems to be right around green and blue, plus ultraviolet and their IR heat sense (very far from red). I would recommend a CHE (ceramic heat emitter) or a RHP (radiant heat panel) instead of heat lamps because neither of these give off light so you can use it 24 hours without disturbing them at night. I use a regular red light bulb to look at Naga in the evenings, and it doesn't seem to bother him, but I don't leave it on over night since I only use it to see him. I use natural light from the window for his day/night light cycle.

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