Types Of UV Light - UV C, UV B, UV A   

UVC - shortwave UV, which includes germicidal ultraviolet at 253.7nm wavelength - is used for air, surface and water disinfection. Unintentional overexposure to UV-C causes skin redness and eye irritation, but does NOT cause skin cancer or cataracts.

UV-B - A small, but dangerous part of sunlight. Most solar UV-B is absorbed by the diminishing atmospheric ozone layer. Prolonged exposure could result in unhealthy effects on the skin and eyes.

UV-A - Long wave UV, also known as blacklight, responsible for skin tanning is also used in medicine to treat certain skin disorders.