High Quality MaterialThe 50W Tortoise Heat Lamp Bulb uses silver plating process to ensure anti-oxidation and anti-explosion. it uses an evacuated glass tube to extend the life of the lamp. Full Spectrum UVA + UVB Sunlight The UVB 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 a higher UV radiation. Easy and Wide UseThe heating bulb uses a 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, tortoises, chuckwallas, etc.