GermGuardian LB4000 UV-C Replacement Bulb is a 5-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 GermGuardian Air Purifier Models AC4300BPTCA， AC4900， AC4825， AC4850， AC5300B， AC5350B， AC5350W. The use of this genuine Guardian Technologies replacement part will maintain the product's performance and warranty.

5-Watt bulb with the power of UV-C. UV-C light fights germs， kills airborne bacteria， viruses and mold spores

The light is a safe， natural way to kill germs without the use of chemicals. Produces no ozone or chemical sprays

Replacement Bulb for GermGuardian Air Purifier Models AC4300BPTCA， AC4900， AC4825， AC4850， AC5300B， AC5350B， AC5350W

Needs to be replaced every 10-12 months depending on use and environmental factors; IMPORTANT: Use genuine Guardian Technologies replacement parts to maintain product performance and warranty

Lamp contains mercury