Sun Jar

I saw the Sun Jar by Tobias Wong at Suck UK Design and thought it would be a perfect instructable project. Unfortunatly I'm no EE and need help with a wiring diagram and parts list. Hopefully we can come up with a design that is easily scalable so people can make different sized Sun Jars or vary it's brightness and battery life. So I guess this is a Instructable request stub hoping one of the gurus out there can fill in the details.