SunSun 13W Watt G23 Base for Most Aquarium UVC Sterilizer USA Replacement bulb for SunSun & Aquatop UV Sterilizers Also works with JBJ 13W Submersible UV Sterilizer, Jebao PU13 clarifier, Jebao CF-10, CF-20, CF-30, PF-30, ViaAqua 13W UV Clarifier Average Life Hour: 8,000hrs G23 2 Pin Base Power: 13 watts