... long lumen depreciation,easy to install UV lamp mostly used in water treatment ! can be made in high ... CE , ROSH certification! can be ozone or ozone free lamp , used high quality quartz glass ! the lenght , ... !Ultraviolet Disinfection Ultraviolet light technology effectively purifies your water, protecting you against viruses, bacteria, and intestinal ... no by-products are created. water purifier uv lamp