Evergreen Pet Supplies 100 Watt UVA UVB Mercury Vapor Bulb/Lamp/Light for Reptile and Amphibian Use - Excellent UVA UVB Reptile Light/Reptile Bulb PERFECT DAYLIGHT BULB FOR YOUR CRITTER: Powerful source of heat & UVA / UVB / visible light - completely self-ballasted (no harmful UVC). Our mercury vapor bulb provides animals warmth & vitamin production necessary for health - just like daylight IDEAL FOR A WIDE VARIETY OF REPTILES AND AMPHIBIANS: Our UVA UVB reptile light is ideal for bearded dragons, tortoises, turtles, geckos, snakes (pythons, boas, etc.), iguanas, lizards, chameleons, frogs, toads & more. An excellent reptile bulb! COMPATIBLE WITH ALL ENCLOSURES: Our large UVA UVB bulb is compatible with a variety of enclosures, including vivariums, tanks, terrariums, vision cages, and more. Perfect for those in need of reptile UVB light and UVB bulbs (light for reptiles) TESTED FOR QUALITY: We conduct a 3-step test on each 100 watt amphibian / reptile light to ensure proper working condition. Used as directed, offers best-in-class lifespan compared to other competitive bulbs (based on in-house testing) Usage directions included. Use w/ good-quality ceramic socket (standard US size) & a large/deep dome designed for large, high-wattage bulbs. Not to be used with dimmers/rheostats. Experiment w/ distance from cage to achieve desired temperature. PLEASE CHECK PICTURES FOR SIZING TO ENSURE THE BULB IS NOT TOO LARGE FOR YOUR FIXTURE.