We have a window in our stairs going up to the second level of our house that is clear glass. Now I don't like the idea of people peering in at any time. Unfortunately its also too high to put up a curtain and try and open and shut it every day to let in light. Finally after much research I came across these very nifty window films that apply in minutes and look like real stained glass! And they are inexpensive too!
So today I put it up. It took about 15 minutes total and that included cleaning a very dirty window. The company is Artscapes and there is a link to the side where you can check out their products.
It was so easy and it made a very ugly window look pretty! Now light comes into the stairs without sacrificing privacy.