Notably, UV-C light is virtually absent in sunlight reaching the earth’s surface due to the absorptive properties of the ozone layer within the atmosphere.
The state-of-the-art UV-C low and medium pressure lamps use a gas mixture containing the elements mercury and amalgam. The mercury vapor is an advantageous gas for the UV-disinfection application, because it emits light in the germicidal (‘germs killing’) wavelengths range (UVC and UVB).
Medium pressure UV-lamps have low UV-C output / energy balance and will therefore not contribute to sustainability.
The special UVOX Redox lamp (450.02.55), however, is a low-pressure amalgam UV-lamp, which emits two peaks of wavelengths, firstly 185 nm and secondly 254 nm with one (single) UV-lamp. The first UV-light emission with a wavelength of 185 nm creates ozone (O3) out the oxygen (O2) content (20 %) in air.
The second UV-light emission with a wavelength of 254 nm has a germicidal effect on all microorganisms and initiates the Advanced Oxidation Process (A.O.P.) as result of the irradiation of the dissolved ozone (O3)  molecule in water. A highly effective hydroxyl radical is formed.
As result of this special UVOX Redox lamp (450.02.55) the triple process of purification is initiated, which leads to adhanced sustainable water management and obvious cost reduction on energy, water (and chemicals). A very low Carbon footprint leads to an early R.O.I..