SIZE & MATERIAL This heat light input voltage is AC 110-220V; Power is 50-Watts;Size is diameter 2 inches x height 2 inches.made of quartz glass and metal. MULTI FUCTIONReptile Heater Lamp provide adequate UVB raditon,promote vitamin D3 synthesis and promote growth and development. EASY TO USE This full spectrum heat bulb is simple and easy to install, just screw it into a standard E27 screw base, very easy to use this UVA UVB Lamp. NOT ONLY FOR REPTILES BUT ALSO. this basking lamp is not only for reptiles also for amphibians,such as bearded dragons, geckos, snakes (pythons, boas, etc.), turtles, tortoises, iguanas, lizards, chameleons, frogs, toads, uromastyx, chuckwallas, monitors, tegus, blue tongues, etc. PLEASE NOTE 1. Please turn on 3-5 hours per day, because long hours of high temperature work can easily reduce the lamp's lifetime; 2. Please do not turn on the lamps immediately after turning off, because the sudden arrival of the electric pulse with the original high temperature lamps may directly burn the lamps; 3. Bulbs surface temperature is high when working, please do not use your hand to test the temperature, also please adjust the distance between the heat lamp and the pets.