We all love LEDs for their bright light with almost no heat. This Day and Night light combo is an excellent way to light your reptiles that don't require UVB. The bright white light provides a perfect way to provide daytime light, while the blue nightlight gives you a blue moonlight shimmer that lets you observe your animal at night without disturbing its natural behavior. It's easy to change between the two: Just tap the Day/Night Button. More efficient than incandescent bulbs (no more of that nasty wasted energy in the form of heat), just an easy way to light your terrarium without the risk of overheating your animals!