Zoo Med Reptisun Mega Compact UVB/UVA Fluorescent BulbZoo Med Reptisun Mega Compact UVB UVA fluorescent bulb professional series. The new shape and unique design allow for wide and even UVB output. ReptiSun provides UVB, UVA, and visible light. UVB ensures healthy bones and bodies for reptiles and helps prevent or halt the progression of Metabolic Bone Disease UVA is part of the visible light spectrum for reptiles. UVA helps increase activity levels, appetite, and reproductive behaviors. Without UVA,