UV (Ultraviolet) light, or UV Radiation, is a naturally occurring form of energy measured on the electromagnetic spectrum. Sunlight is the most common form of UV radiation, which produces three types of UV waves: UVA, UVB, and UVC. UV light is invisible to the human eye. UVA and UVB light emitted by the sun reach the earth’s surface and can cause damage to human skin with prolonged exposure (sunburn). UVC light is absorbed by the Ozone Layer in the earth’s atmosphere before reaching the earth’s surface.