Lightly used Light Monkey 10-21 HID canister light. This was the workhorse light of cave diving for a number of years. I bought it 5-6 years ago from someone who wanted to "pay it forward," charging me just $450 for what I believe Light Monkey was still at the time selling for over $1k. I bought it for training through GUE Fundies tech level, and it got me through that. This is a great light for someone in a similar position. Or someone who just likes HID lights. Burn time when I tested it yesterday was 3 hrs 30 mins, which is the same as it was when I bought it, according to my notes. It can still be found in Light Monkey's web site, 10-21 HID, and I believe parts are still available, though there's nothing wrong with this light as far as I know. A charger (in the background in the first pic) is included. I'm asking $250 plus shipping.