Ultraviolet lamps have been used for a long time and widely in HVAC systems. C-wavelength lamps are used for condensate, cooling, humidification, air disinfection when it is desired to eliminate the multiplication of viruses, fungi, palate or microorganisms. A properly designed lamp system can kill up to 99.99% of microorganisms. UVC lamps can operate from 8,000 hours. up to 18,000 hours optionally depending on the product type.