Bests & Worsts Reviews from Amazon

Should have done more research before I bought this light to find cat pee. I shine it, in total darkness, at spots that reek of cat pee, and nothing glows. I shine it, in total darkness, on visible (in daylight) streaks on my door where my dumb cat sprays, and nothing glows. After trying it out (too late), I researched the best wavelength for making urine glow, and found that anything longer than 390 nm is mostly in the visible range (but pretty! and purple!), and won't do anything to help you find accidents. 370 - 375 nm is what you should be looking for. It's a little disingenuous to market this as an aid to finding exactly where you have cat pee in your house. Great for making black-light posters, tee-shirts, and the adhesive that the linoleum guy got on the flooring when he installed it glow, and sheetrock pebbles, too. PS. the distance unit for the wavelength is nm : nanometers; nM stands for nano mega, which doesn't mean anything. Should have known, just from that, I guess.