I have several streamlight twin tasks. One has a glass lens the other plastic. Each body has a different color. The one containing the UV has a plastic lens. That plastic, visibly absorbs some of the UV. I tried the glass lens and it works much better. Well I emailed Streamlight to see if I could get a replacement bezel with glass. They said that if the light was defective or broken they would fix it. I guess I could try to find a lens somewhere and figure out how to replace it.