The technology uses a special ultraviolet light called far-UVC that has a lower range of wavelengths for disinfection. Ceiling lamps using far-UVC light could be a highly effective tool in protecting public health. Due to the way ultraviolet light kills microbes, viruses and bacteria cannot develop resistance as they do with vaccines and drug treatments. Source: Cheap indoor lights could wipe out COVID and flu viruses in 5 minutes – Study Finds