LSE Lighting 55 watt TUV PLL 2G11 PLL55TUV Germicidal UV Bulb Brand: LSE Lighting Base: 2G11; Length: 21" long Type: Ultraviolet UV Bulb Wattage: 55W; Voltage: 110 - 240V This UV bulb is used in many Air and Water purification systems, including HVAC UV sterilizers.