"We were given several options of solar film and decided to go with the darkest film for several reasons....The windows that Solarworks applied the film to face west. My husband works midnight shift and the 8 X 8 foot windows are on the third floor across from the bedroom. He sleeps days so the film makes it dark enough. I also love the fact that we can watch tv after 2 pm without the blinding glare in the room. I can't wait to get my electric bill because I have had to turn the air conditioning up and even turn off my ceiling fan in the afternoon because it gets too cool in a room that used to be like an oven. Thanks for the excellent service and quality products!"