Many years Ultraviolet (UV) has been used in wide range of environment as an effective way of killing germs and bacteria on surfaces. UV light—particularly the shortest wavelength, known as UVC which has a wavelength between 200 and 280 nanometers, while visible lights smallest wavelength measures 380 nm — kills viruses in a matter of minutes by damaging their DNA or RNA, crippling their ability to make copies of themselves.