Hi, I couldn't believe I have not heard more about solar screens before here in Tampa. As hot as the sun is and as much as our air conditioners work in the summer, we need them. These screens take the place of regular insect screens and they block 70-80% of the sun's rays that cause heat. Then much of the leftover heat is blocked by the window itself, leaving your house much cooler. You can still see fine out of the window.
You can learn more at this site about solar screens in Tampa and see the results of some of the customers they have had, a large savings in energy costs.