UVC tubes have the shortest UV wavelengths (200-280nm) and thus is perhaps the most dangerous. As a result, extra precautions should be taken when processing and using these types of UV lights. The UV radiation emitted by these light tubes targets the DNA of microorganisms, causing cell death or rendering reproduction impossible. They are not the type of light tubes that should be used in the home. They are mainly used in professional and industrial settings for processes such as water treatment, disinfection, sterilization, and food sanitation. Unlike the UVA lamps, germicidal tubes are usually transparent. Wear protective clothing when handling UVC germicidal lamps and keep them away from your skin and eyes. It is best to avoid prolonged exposure to the light when it is in operation.