GPH843T5 WUVLAMP12 UV Bulb 41W 843mm for water system WUV12-110 12GPM Brand: LSE Lighting Base: 4pin (4pins on one end) - Length Approx: 33" 843mm Wattage: 41W - Voltage: 120V 50/60Hz - Super Life Rating: 12,000hrs This UV replacement bulb by (LSE Lighting) brand is 100% compatible for use with Ultraviolet Disinfection System WUVLAMP12, WUV12-110.