... Power:4w,6w,8w,12w,14w,21w,28w.Characteristic:uv lamp emit a large amount of UV at 253.7nm, which ... and electrical characteristics with those general fluorescent lamps used for illumination . These lamps use ultraviolet glass, which effectively transfer UV at 253 ... be used for product surface ,water and air's disinfections, the food stores and the photo chemistry responds. uv lamp for water treatment