We have a walk-in closet with a window. In the summer, the sun shines in that window and was threatening to fade my clothing. We purchased and installed this shade on that window. The light still comes through, but I believe it has solved the problem of faded clothing. We had to purchase a shade that is much too long for the window - and pay for that length - but it isn't evident that there is so much extra, unused shade on the roller, and it rolls up and down smoothly. I would recommend this solar shade.