Last night, I was playing around with a few of these: http://www.ebay.com/itm/290818283891?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 and I got flashburned, similar to welding flash...maybe just as bright. I didn't think about them flipping around...and Bamm! Had two of them hanging on test leads, and fired them up at 9 volts, not so bad...then at 13 volts, they slipped in my grip, and naturally I glanced down....Damn! Sure as hell lit up the whole room. After the flash, I had trouble seeing/focusing, for a good 1.5-3 hrs. I figured they would be bright, but not that bright. Never thought that 10 Watts could be so damn bright. You can probably tell that I don't know much about new electronics, especially digital crap. Used to repair TVs and stereos in the 40s to 70s. Sometimes. Simple repairs.... Anchor these babies down, when you make a test run. Only takes a few seconds. "Don't go into the light..."