WHY SO IMPORTANT: UVB lighting is a crucial component of proper reptile health. Many species of reptiles will develop bone deformities and softening if not exposed to sufficient amounts of UVB light. Repilogi fluorescent reptile lamp provides UVB rays that mimic the sun, helping your reptiles to produce additional vitamin D3 for strong bones, digestion, and immune system health. IDEAL FOR REPTILES SPECIES: This UVB lamp offers the perfect spectrum to synthesize vitamin D3, which is necessary for proper calcium absorption, making it ideal for all tropical and sub-tropical reptiles. Its output will stimulate your reptile's natural year-round cycle of feeding, breeding, and other natural behaviors. LONG SHELF LIFE: This revolutionary UVB Reptile bulb is built to last longer, providing a service life of up to 10,000 hours! The better circuit board allows our UVB lights to last many times longer than the competition while producing brighter light that your reptiles need for better growth.