The Sunâs rays play a vital role in purifying the Earthâs air. Ultraviolet light irradiates the atmosphere, destroying biologicals (UV wavelengths). WHAT ARE UV-C RAYS? Light in a broad sense can be divided in visible, infra-red and ultraviolet rays. Ultra-violet rays (invisible) can be classified in: - UVâA (with tanning properties) - UVâB (with therapeutic properties) - UVâC (with germicidal properties) The germicidal effects of the UV radiation destroy DNA of Bacteria, Viruses, Spores, Fungi, Moulds and Mites avoiding their growth and proliferation. The new UV-GATE tunnel washers Human body without any chemical. UV-GATE is walkthrough tunnel with UV radiation and hot air.