It's an interesting idea, but I think you'll be surprised at how fast the sun moves. You can try it yourself. Put up a small mirror that reflects a sun spot on

It's an interesting idea, but I think you'll be surprised at how fast the sun moves. You can try it yourself. Put up a small mirror that reflects a sun spot on a surface. Clock how fast it moves a centimeter. Multiply that distance with how much further away a central tower would be.