The award-winning, industry standard UVB lamp for reptiles. A full 5% UVB output allows vitamin D3 synthesis to occur naturally, preventing or reversing Metabolic Bone Disease and other health problems in Turtles and Tortoises, Bearded Dragons, Iguanas, and all other diurnal reptiles. The ReptiSun 5.0 is effective for UVB induced photo conversion of vitamin D3 in reptile's skin at distances up to 12". Accept no substitutes; get the original reptile UVB lamp - Zoo Med's ReptiSun 5.0!