LSE Lighting Compatible UV Light Bulb UVC-L212T5 6W for RO Water System Brand: LSE Lighting Bulb Type: Ultraviolet Germicidal for Water Filtration Systems Wattage: 6W, Base Type: 4pin (4pins on one END) Overall Length: Approx 8 1/2" (212mm) - Voltage: 100~240V at 50/60 Hz This UV replacement lamp by (LSE Lighting) is 100% compatible for use with 1G UV Water Sterilizer Clean/RO System.