... ,6w,8w,12w,14w,21w,28w.Characteristic:uv lamp emit a large amount of UV at 253.7nm, which have excellent germicidal ... illumination . These lamps use ultraviolet glass, which effectively transfer UV at 253.7nm. We can provide different specs., shapes and ... research, be used for product surface ,water and air's disinfections, the food stores and the photo chemistry responds. uv lamp for water treatment