Offers 5% UVB and is ideal for reptiles that require a medium amount of UV lighting! 13 watts, and is short enough to fit any standard sized clip lamp without sticking out! The Exo Terra Repti Glo 5.0 has a moderate to high UVB output, similar to that of shady environments such as rain forests and other tropical locations. Reptiles living in these habitats receive less UV radiation because of the many climatological conditions (fairly high humidity, changes in weather, etc) that prevent direct sunlight from reaching them or their basking sites.