Premium MaterialThe 25W tortoiseshell heat bulb is silver plated with a durable wick to prevent anti-aging and three-dimensional glare. Provide anti-oxidation and anti-explosion. It uses evacuated glass tubes to extend the life of the lamp. Full Spectrum Sunlight The glass tank heating bulb provides warmth in cold seasons. It also contains 97% UVA to stimulate appetite and 3% UVB to promote vitamin D3 synthesis for complete calcium absorption. Bring sunshine home to prevent disease and promote growth. Technical Features25W Dimmable UVA UVB Crawler Light Diameter: 50mm E27 Screw base AC 220-240V input voltage. Simple and easy to install, just screw into standard E27 screw base Wide UseThe heat lamp adopts standard threaded base, easy to install. Suitable for a variety of reptiles and amphibians including turtles, lizards, bearded dragons, snakes, frogs, iguanas, tortoises, chakravaras and more.