Thanks for a completely thorough and accurate article.<br><br>Incidentally, I have the Lightwave 2000, which you rated well. And I concur that the only fault I have with it is the rotary head switch. I put it away in the "off" position once and it powered itself back on again sometime later. It was still a new "toy" so I pulled it out of the sheath and the bulbs were glowing dimly. I think it was about 4 days later. I now make a practice of double checking it the next day just to be sure.<br><br>Also, unscrewing the head into the off position releases pressure from the “O” ring that seals the unit. I haven’t tested it, but I would assume that would leak if submerged. Once the head is in the “on” position, the head is tight against the seal. So the unit would be waterproof while in use. I use this as a general-purpose flashlight instead of a survival light, so I don’t perceive this as a problem.<br><br>I was truly amazed with its performance this winter when my son's Cub Scout pack went to Eagle Cave, WI for a weekend trip. Eagle Cave is a short (1/4 mile?) cave with a paved floor and a string of incandescent lights. But there were plenty of nooks and crannies and tunnels for the kids to explore and use flashlights, all weekend long - night and day. While other parents where constantly changing batteries for their sons', mine never stopped and showed no sign of diminishing. The bright white light also made it easier for me to track down my son compared to the yellow glow of the other, traditional flashlights.<br><br>I am very satisfied with the performance of this product and it's well worth the $30.<br><br><br>Willie Vannerson<br>McHenry, IL