Guardian Technologies LB4220 UV-C Replacement Bulb is a 1.2-watt bulb. The UV-C light fights germs, kills airborne bacteria, viruses and mold spores. The light is a safe and natural way to kill germs without the use of chemicals and produces no ozone or chemical sprays. It does contain mercury. This bulb needs to be replaced every 10-12 month depending on use and environmental factors. It can be used for the Guardian Technologies Air Purifier Model AC4220. The use of this genuine Guardian Technologies™ replacement part will maintain the product's performance and warranty.
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