This is a prop for a demonstration about energy movement and waste. It begins with a dark room. I turn on the barrel and begin to discuss the energy it takes to light it. I question how much light energy is never able to escape the walls of the barrel. How much is just bouncing around inside? With the ladle I reach in and pull out a scoop of light in the form of a photocell, battery, and LED. The batteries which started out dead, have been charged via the photcell during my introductory remarks. Now, some of the actual light (previously wasted energy) can be carried around and used elsewhere.