9W 9 Watt UV-C Germicidal Ultraviolet Replacement BULB W/ G23 BASE 9WATT Anyray 9W 9 Watt UV-C Germicidal Ultraviolet Replacement BULB W/ G23 BASE 9WATT Anyray AUVC-9W Works with 110 Volt 120 Volt 130 Volt 220 Volt 230 Volt 240 Volt 18Watt G23 base Long Life 10,000 Hours Length: 6.5'' inch long 100% Ozone Free Short-wave UV radiation with a peak at 253.7 nm (UVC) for disinfection purposes