UV light is a part of the natural sunlight emission spectrum. The UV radiation is then divided into four sub categories based on the wavelength of the radiation itself: UV-A, UV-B, UV-C and UV-Vacuum. Progressively, in nature, the radiation above the UVA is stopped and absorbed in the Ozone layer, these radiation would be very dangerous for humans. Among the wavelengths of UV light, the one to which the DNA of living beings is most sensitive is the specific one of UVC radiation. Living organisms do not have adequate defense mechanisms against ultraviolet rays, being ourselves protected from the ozone layer. The photochemical reaction deriving from exposure to UVC light entails the breaking of bonds within the DNA chain, inhibiting their reproduction and proliferation. The peak of maximum sensitivity of the DNA is at the wavelength of 260nm. UVCs eliminate bacteria, viruses, fungi, spores, molds and mites by destroying their DNA. Disinfection with UVC ultraviolet light is an innovative and eco-compatible technology, it allows safe and effective disinfection, it is a chemical-free solution that does not use oxidizing additives and does not cause odors in the air purification process and flavor in the water. Led UVC technology is able to achieve the same results as standard UVC lamps while offering revolutionary characteristics in terms of size and power ratio and applicability. UVC LEDs are very expensive unlike the more classic lamps or germicidal systems that often work close to 400nm and therefore of little real efficiency for the intended purpose! The use of the latest generation of LED UVC emitters allows the best performance without management costs.