We offer a range of replacement UV steriliser lamps & tubes for the AC UV range . Ultraviolet light is a very effective way of killing microorganisms found in water. UV lamps are most commonly used to treat water that has come from a well, borehole or private water supply. We provide replacement lamps that will treat water for approximately 8000 hours – which commonly works out at around every 10 months or so. UV lamps may continue to shine after this period of time, but may not be treating the water which is a common misconception.