Blue Spotted 10.0 UVB Compact Fluorescent Bulb/Lamp Simulates the natural affects of sunlight to promote a healthy and strong reptile UVB: This fluorescent tube is specifically designed to emit ultraviolet light through carefully calibrated wavelengths Provides essential UVB light for reptiles, helps to prevent and may reverse metabolic bone diesase in captive diurnal (active during the day) reptiles Combined with a healthy diet, UVB helps the reptile's metabolism with calcium absorption UVB light generates a chemical chain reaction beginning at the skin, promotes food digestion, and allows reptiles to process Vitamin D. Use with appropriate clamp lamp fixture. Other bulbs to consider are: Blue Spotted Basking Spot Lamp, Mercury Vapor Lamp, and Heat Emitter.