UV light purifiers are devices that use ultraviolet light to kill or inactivate harmful microorganisms, such as bacteria and viruses, in the air or water. They work by emitting UV-C light, which disrupts the DNA or RNA of these pathogens, preventing them from reproducing and causing illness. These purifiers are commonly used in homes, hospitals, and water treatment facilities to improve hygiene and safety. They are often part of larger systems, such as air purifiers or water filtration systems, and can be an effective way to reduce the spread of infectious diseases and improve overall air and water quality.