BoomerZoo Almanac for May 27-June 2 2007: Hey, groovy, man!
The very first black light was sold on this day in 1961, giving us Boomers a chance to show off glowing teeth and T-shirts along with those psychedelic faces in Daliesque posters. Black lights and strobes let us see the world in a whole new way, and probably led us down that slippery slope between the Evil Weed and LSD. Or maybe the slope went the other direction. Who knows? Those strobe lights gave me a headache, though they were at least legal, unlike most of the other things that gave me headaches as a teenager.
Here are some links to articles that tell how black lights and strobe lights work, along with a long list of materials that glow under black lights, including body fluids, antifreeze and teeth whiteners. Have fun!