This kind of e27 base uv lamps is like energy saving lamps direct install into the lamp fixture. Type of tube power supper power(w) wavelength of radiation:253.7mm measure(mm) diameter of tube ( mm) pcs A b H-9w 120v-230v 9 253.7mm 197 117 12 50 H-11w 120v-230v 11 253.7mm 220 140 12 50 H-18w 120v-230v 18 253.7mm 260 180 12 50 H-24w 120v-230v 24 253.7mm 300 219 12 50 H-30w 120v-230v 30 253.7mm 415 335 12 50 H-36w 120v-230v 36 253.7mm 455 375 12 50 Tube-shape ultraviolet iow- voltage mercury sterilizing lamps & lanterns serie This type of tube radiate mainly with 253 77nm short-wave ultraviolet of sterilization at a vertical distance of i m away from 30w sterilizing lamp infected glass prate is placed, with affection of 1 minute, it has an average rate of sterilization on colibaciltus (8099) of 99%, 99 95% on staphylococcus aureus (atcc6583); with affection of 45minutes, there are an average rate of sterilization on black inte~arieted gemmae of hay-bacillus 9992% in a 253 space room, with affection of 3o minutes, it has an average tate of sterilization on staphylococcus aureus (tycc6583) in air of 100% excepting refrigerating chamber and household, it can be widely applied in fields of medicine, pharrcacy, pharmacy, foodstuff industry and ecological research for sterilization of surface of matter, water and air, food storage and photo-chemical reaction Applications:desk lamps, kiitchen and bed rooms, disinfection at small areas. In ctn.