Ultraviolet germicidal irradiation is another replacement available for water sterilisation. A germicidal lamp is an electric light that produces ultraviolet C (UVC) light. Such a lamp can then be used for ultraviolet germicidal irradiation. Production of ozone is one of the potential dangers of ultraviolet germicidal irradiation. Citations for larger area disinfection are for non-LED UV sources known as germicidal lamps. Some phenols are germicidal and are used in formulating disinfectants. Vycor also has ultraviolet transmission to about 250nm and is used in some germicidal lamps. The compound is set to be the largest Ultraviolet germicidal irradiation plant in the world. The lifetime of germicidal UV bulbs varies depending on design. UV is categorised into several wavelength ranges, with short-wavelength UV (UV-C) considered "germicidal UV". This filter integrates the germicidal properties of copper with the conventional filtration. Inside the car, police found a container of liquid bleach, germicidal wipes, and window cleaner. During World War I he studied camouflage, and later invented artificial sunlight and germicidal lamps. The body is washed in a germicidal soap. Vaughan became convinced that germicidal properties of serum was thanks to nuclein.