12-09-2009, 08:11 PM
Gary, I would look into installing solar tubes when you build the layout building. They use sunlight to light the room beneath them, and after dark, the reflective sides of the tube amplify a relatively small light bulb. They don't transmit heat, so you don't need to worry about them getting too hot in summer, but they will give you the maximum of free light for the cost of including them in your construction.