hey guys ive just conducted a physics experiment dealing with converting laser energy back into electrical energy. ive only just done the testing but i can tell you its not very efficient but it does produce some results. We used two lasers, a green and my homemade dvd burner red firing across my house onto a solar panel. it will be some weeks but ill post my experimental write up here with all details and pics and such. tho i will note now that the red laser was more efficient than the green, i suppose this will all come back to the wavelength and the photoelectric effect after all .