Osram UV Light Water Purifier Size: 8'' 11 W Power No secondary pollution Efficient/Long Life Suitable For Kent And All Kind Of R.O./U.V. Purifier These are ussed For Ro Uv /UF water purifiers .These lamps are sized 8 inch. No Secondary Pollution. No chemical added to the water supply. No change in taste, odor, pH or conductivity nor the general chemistry of the water. Disinfect harmful bacteria and viruses in 1-2 seconds.Normally, the lamp can work more than 9000 hours. These work by emitting UV light with the peak wavelength of 253.7nm, UV Light sterilizer kills 99.99% microorganisms including bacteria, viruses, fungi and protozoa. Brand No Brand SKU OT776EL12Y12KNAFAMZ-201808