UVB bulbs mimic the UVB and natural light from the sun to promote calcium absorption and growth for reptiles. 【ETL Listed UVB Bulb】The Compact UVB spiral bulb is essential for reptile health and growth. The UVB output will stimulate activity and appetite in your reptile, metabolizing calcium for healthy bone growth while in captivity. 【Quality Control 】ETL certified reptiles bulb, Safe and Secure to Use, Up to 7,000 Hours of Lighting Life, 80% Energy Saving 【Specifications】Voltage: 120V, Wattage: 24W, Base type: E26, 10.0 Compact UVB Bulb, Ideal for desert reptiles 【Warranty】If you are not happy with our reptile bulbs or receiving a defective unit, we will propose you a satisfactory resolution. Please feel free to contact with us if any questions or concerns.