Blue Spotted 2PK Mercury Vapor Lamp TI (160 Watt) - Tested & Inspected - Provides Essential UVB & UVA For Reptiles Self-Ballasted Mercury Vapor TI 160 Watt UVB Lamp provides essential UVB & UVA for reptiles Helps prevent metabolic bone disease in reptiles and the prevention of calcium deficiency in reptiles Fits standard ceramic sockets on clamp lamp fixtures. Great for turtles, other reptiles, and birds in large enclosures, terrariums, and aviaries. Studies show that natural sunlight provides benefits to reptiles. Recommended for terrarium setups that allows reptiles to regulate their exposure to UVB and UVA.Please check with your local reptile store when choosing a lamp. Use with appropriate clamp lamp fixture. Besides the vapor bulb, consider these other bulbs and items: Blue Spotted Basking Spot Lamp, UVB 10.0 Compact Fluorescent, heat emitter, clamp lamp stand, clamp lamp, and wire cage clamp lamp Tested & Inspected for issues. Our TI model is Tested to insure it is working & Inspected to insure your pet gets the quality it deserves