Zoo Med ReptiSun® Compact Fluorescent UVB LampNEW SHAPE: Unique design allows for wide and even UVB output. ReptiSun provides UVB, UVA, and visible light UVB: UVB ensures healthy bones and bodies for reptiles and helps prevent or halt the progression of Metabolic Bone Disease. UVA: UVA is part of the visible light spectrum for reptiles. UVA helps increase activity levels, appetite, and reproductive behaviors. Without UVA, reptiles are colorblind! Usable UVB up to 42 away Great for large reptiles