Bright (UV) light is a part of the electromagnetic range that falls in the area between obvious light and X-Rays. Most characteristic UV light is created by the sun with around 10% of daylight being UV and just around three to four percent infiltrating the climate to arrive at the ground. Of the UV radiation that arrives at the earth, 95 percent is UVA and five percent is UVB. No quantifiable UVC from the sun arrives at the world’s surface. As a result of the phantom affectability of DNA, just the UVC locale shows noteworthy germicidal properties. As apparent by various exploration studies and reports, when natural life forms are presented to profound UV light in the scope of 200 nm to 300 nm it is consumed by DNA, RNA, and proteins. Assimilation by proteins can prompt burst of cell dividers and demise of the living being. Retention by DNA or RNA (explicitly by thymine bases) is known to cause inactivation of the DNA or RNA twofold helix strands through the development of thymine dimers. On the off chance that enough of these dimers are made in DNA, the DNA replication process is upset, and the cell can’t reproduce. It is widely accepted that it is not necessary to kill pathogens with UV light, but rather apply enough UV light to prevent the organism from replicating. The UV doses required to prevent replication are orders of magnitude lower than required to kill, making the cost of UV treatment to prevent infection commercially viable.