There are three type of UV radiation found in sunlight. There’s UV-A and UV-B, which you may recognize from sunscreen labels. UV-A and UV-B cause sunburn and signs of skin ageing like wrinkles and age spots, and even skin cancer.
We don’t come into contact with UV-C because it is filtered out by the ozone layer in the Earth’s atmosphere. The wavelength of UV-C light is shorter than the wavelength of the light we can see and spans the range of 100-280 nanometers (nm). It is most effective at inactivating viruses on or around 260-265nm, known as the ‘germicidal peak’. Signify’s UV-C lamps operate at 254nm, which is proven to be highly effective in inactivating viruses, bacteria and mold spores.
Humans and animals should not be exposed to germicidal UV-C light at this wavelength as it can cause damage to their skin and eyes in a matter of minutes1 of exposure. That said, provided that our UV-C products are used and installed correctly and in accordance with our user manuals and mounting instructions, UV-C is a reliable and highly effective form of disinfection, with safety risks mitigated by the appropriate safeguards put in place.