Hello, I'm using UV-C (Hg low pressure lamp) and I wanted to see if someone could give me some insight. I have a couple of questions: 1) How far does UV-C penetrate through various materials? In my testing, it seems to go straight through plastics. I have UV blocking glasses - but those are most likely designed for UV-A/B. Some literature I found indicates that any eyeglasses should be more than adequate for stopping all UV-C - but I'm nervous because it seems to have no problem with plastics (not sure the type) 2) What effects of UV-C could I expect to feel on myself? I would only be exposed a few seconds at a time - I imagine that this is much less radiation than I would be exposed while arc welding (used to do that a lot). The bulb I am using is a Ushio G25T8 25 Watt bulb. I can't imagine that this UV source is more dangerous than a 130 ampere arc... Anyways, I'm working on a biology project to see if I can encourage a culture of bacteria to adapt a resistance to UV-C with the hopes of earning a scholarship or something along those lines. Any help would be great - even if you just point me in the direction of a book! Thanks.