Provide the necessary warmth and light your reptile needs with Zilla Incandescent Spot Bulbs. These bulbs are easy to use for any reptile terrarium and feature heavy-duty filaments that yield more hours of service from every bulb. They provide focused heating and lighting for reptiles that create the natural daytime light-environment in their terrarium. Plus these bulbs are an ideal heat source for basking as they help regulate your reptile’s body temperature. Zilla Incandescent Spot Bulbs are available in three colors. Day White is ideal for reptiles requiring bright naturalistic daylight such as bearded dragons iguanas and other diurnal species. Night Red and Night Black are ideal for nocturnal setups where maintaining a low light level is necessary to simulate natural nighttime conditions. Recommended for use with Zilla Reflector Domes. Celebrate your pet and Rep Yourself with Zilla.