This Remember Ohms law from last time. Here are two circuits below. If you know Ohms law you should be able to make the light come on in one only one try as the amperage, I, is now specified. -788 The geometric arrangement of the mirrors is interresting. It will raise alarm bells for environmentalists. Its probably safe to assume that natural formations do not occur in perfect eliptical bowls facing south very often. So, youre going to have to move a lot of earth to make one of these, and its going to be on the scale of a big strip mine or mountain-top removal process. You could minimize the evils and try to use mountaintop removal sites and other existing excavations, and convert them to this purpose after the mining is done, I would guess. Its still going to leave a got-awefull gaping hole in the ground covered in mirrors. "advantages for wind turbines " and "how to build your own house cheap " (include "average monthly power bill", "home energy efficiency calculator ", "discounted greenhouses ", "howard johnson magnetic motor fraud ", "magnetic motor starter diagram ", "Magnetic center of a motor ", A home energy audit can save 30% on bills and emissions and is in a fast growing industry. Energy audit certification could launch your green career. & Battic door home energy monitor )