The DM900-0191 is the factory replacement germicidal UVC lamp for our 5 in 1 HEPA air cleaners (models DM900, P900, SA900). The HEPA air cleaners have (2) DM900-0191 lamps inside. These germicidal UVC lamps kill/inhibit airborne bacteria, viruses, mold spores, fungus, and microbial growth without producing ozone.
Typically replaced every 2-3 years based on normal environment. (cycling UVC lamps on/off will shorten their life)