... uv output uv ,the life time can reached 13000 hours, have passed CE ,ROHS ,ISO9001! Power:4w,6w,8w,12w ... ,14w,21w,28w.Characteristic:uv lamp emit a large amount of UV at 253.7nm ... These lamps use ultraviolet glass, which effectively transfer UV at 253.7nm. We can provide different specs., ... shapes and UV output so you can select the appropriate one ...