... life,long lumen depreciation,easy to install, used in uv water purifier high uv output ,the life time can reached 1300hours ,used in ... of the materical have passed IO9001 , CE , ROHS certificates!The lamps can be ozone ozne free !used high quality quartz glass ... !this uv lamp can be made is standard , hight output , and amalgam lamp ! mostly used in uv water purifier ! UV water purifier