What’s UV-C Lamp?
Ultraviolet (UV) light is electromagnetic radiation with a wavelength range from 100 nanometer (1 nanometer =10-9 meter) to 400 nanometer and energies from 3eV to 12eV. It is named because the spectrum consists of electromagnetic waves with frequency higher than those that humans identify as the color violet.
How did the UVC light kill the bacteria?
At a wavelength of 254nm, UV-C causes damage to DNA (Deoxyribonucleic Acid) of microorganisms by forming covalent bonds between certain adjacent bases in the DNA. The formation of such bonds prevents the DNA from being unzipped for replication and the organism can't survive. UV-C deactivates the DNA of bacteria, viruses, spores, dust mites and other pathogens and thus destroys their ability to multiply and kill them.