Zoo Med Reptisun 5.0 T5-Ho Uvb Fluorescent Lamp - 54 w - 46" Used and recommended by zoos, veterinarians, and top reptile professionals Stronger UVB and Brighter Light: Twice as strong as standard ReptiSun 5.0 Lamps Helps to prevent or reverse Metabolic Bone Disease commonly seen in captive reptiles Increased UVB Output: Perfect for larger reptile habitats (see lamp distance notes on package) Made in Germany