36W, 36 Watt 110V Cal Pump UV Sterilizer Light Bulb 2G11 Base BF4000 and UV36
You are purchasing one 36W 36 Watt Cal Pump UV Sterilizer Light Bulb 2G11 Base Extra large Bio Filter #BF4000 and UV36 Clarifier. Base: 2G11. The compact size of bulb allows for a small system design and design flexibility.