Give your reptile the benefits of natural sunlight with the Exo Terra Solar Glo All in One Reptile Bulb. Reptiles require both UVA and UVB light to produce vitamin D3 which aids in the absorption and metabolization of calcium. The Exo Terra Solar Glo All in One Reptile Bulb is the choice of professional breeders as it provides the proper balance of ultraviolet light (including UVA and UVB), visual light and infrared light (heat), in one easy-to-install bulb. Exo Terra Solar Glo All in One Reptile Lamp is a full spectrum light with carefully tuned peaks to ensure appetite, activity, brilliant colors, and optimal calcium absorption.