> tubes sold for germicidal use I initially thought that, but they put out UVC, and I believe it's UVB and UVA needed for resin curing BTW, I have a small 7W UVC germicidal tube in the filter of a fish pond and it's just fantastic at destroying algae (busts up DNA AIUI). Water is > 2ft deep and crystal clear Joe --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .