Living down here in Southern Texas we have solar screens on our windows to help regulate cooling costs in the Summer months. I have 2 windows that I do not have screens on for this very reason. Our solar screens block around 80% of the light/UV and effectively block around 75% of the Sun's warmth from entering the room. They work amazingly well, however, if you put a plant in the window and expect it to grow, you will be sadly disappointed.
