< 55W UV Replacement Bulb 4 Prong for Water Purifier Ultraviolet Light Made by: Unit Price: $39.99 The specifications of the set are as follows: 55W Ultraviolet Light Bulbs(55W-UV) – Kills harmful Bacteria, E Coli, Viruses Fungi, Algae and most microorganisms including cryptosporidium and giardia, and many other contaminants. This bulb is replacement bulb for Ultraviolet Light Water Purifier Whole House UV Sterilizer 55W, 12 GPM Product Features Length: 36.5" UV lamp: 55W Voltage:110V & 220V Base: 4 Prongs UV Lamp Life: 9000 hours (about 1 year)