UV-C LIGHTING: HOW EFFECTIVE IS IT ON COVID-19 AND OTHER VIRUSES?
For decades, the world has been harnessing ultraviolet (UV) light as a tool. Its power to sterilize has made it essential to the drinking water of billions of people. Research laboratories operate powerful UV lights to clean germs from sensitive equipment. Hospitals and medical facilities use UV light to disinfect and decontaminate surfaces and implements.
But why? What makes UV light so special? What is UV light, even, and how is it different from “normal” light? Most importantly, how does it work to sterilize, clean, and disinfect?
What is UV light?
Ultraviolet light is, literally, beyond the bluest light our eyes can see. Whereas visible light waves have a wavelength anywhere between 380 to 740 nanometers, ultraviolet only reaches as high as 400 nm, and drops as low as 10 nm. That takes essentially all UV light out of visual range.