8W GRAV Filter UV Bulb POND Products - POND - UV STERILIZERS Bulbs Lamps 8 Watt 8 watt UV STERILIZERS bulb Works with 110 Volt 120 Volt 130 Volt 220 Volt 230 Volt 240 Volt 18Watt Life: Approx. 10,000 Hours bulb life / Length is 12'' Inch 100% Ozone Free Short-wave UV radiation with a peak at 253.7 nm (UVC) for disinfection purposes