Check the listing for details. 5 Watts G23 Base UV-C Germicidal Ultraviolet Light Bulb Qty 2. Condition: New. Listed at 12.57 USD. EPA Est. No. 96959-CA-1 Base: G23, Power: 5-watt100% Ozone Free Short-wave UV radiation with a peak at 253.7 nm (UVC) for disinfection purposesAverage Life Hour: 10,000hrs, Length - Inches: 4-inch (overall)For Use in Ultraviolet Sterilizers for Aquarium and Pond, uv air purifier and sanitizerApplications Use: -Deactivation of bacteria, viruses and other micro-organisms -Residential drinking water units -Fish Pond and Aquarium Sterilizers -In-duct air treatment units -Stand alone air purifiers -Air disinfection systems in for example hospitals, universities and laboratories All Brand names, product names or trademarks listed on our page belong to their respective holdings. Manufacturer names are provided as a reference only for compatibility