Todd, that's on my to-do list. I've accumulated the bits and pieces (PV panels, batteries, charge controller, and 30 Luxeon 1 LEDs) but haven't had time to put it all together.

Strongly recommend you check out http://www.candlepowerforums.com/vb/forumdisplay.php?s=cb1ab5f4b1cef75db894f137417ba4ce&f=89 . Go back a year or more. There are people who have done it, with photos and descriptions in detail.