MaterialThe 25W Tortoise Heat Lamp Bulb uses silver plating process to ensure anti-oxidation and anti-explosion. it uses vacuum glass tube to prolong lamp life.Full Spectrum UVA + UVB SunlightUVB bulb provides warmth for reptiles in the cold season. beside it contains 97% UVA which stimulate appetite, 3% UVB promote vitamin D3 synthesis, fully absorb calcium. Bring sunlight home to prevent disease and promote growth.Improved UVA Output: An improved concave and convex reflector improves the UVA spectrum and provides more direct sunlight and higher UV radiation.Easy and Wide UseThe heat bulb uses standard E27/E26 screw base for simple and easy installation. It is suitable for a wide variety of reptiles and amphibians, including turtles, lizards, bearded dragons, snakes, frogs, iguanas, turtles, chuckwallas, etc. Material 25W Reptile Lamp Use silver plating process to ensure anti-oxidation and explosion resistance. It uses Vacuu glass tube to extend lamp life.Upgraded UVA outputA Improved concave and convex reflector improves UVA spectrum and privacy of more direct sunlight and superior UV radiation.specificationMaterial: quartz bulb filled with hydrogen gas;E26 / E27 base socketWatttage: 25WVoltage: 220VSize: High: 1.9 inch (4.8m)Diameter: 2 inches (5cm);Color: silver.Easy to installThe heat bulb uses the standard E27/E26 screw base for simple installation and easy to install.