... 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 ... shape,pen-shape,various special shapes.Model: GPH212T5L,GPH287T5L,GPH893T5L,GPH1148T5L,......Diameter(mm): 15Length(mm):212,303, ... types according to your detailed requirements! UV lamp/light 7W