A bay window can add light, interest and additional space to your living room. Here are seven practical ways to use and furnish your bay window space. Bay windows are a brilliant investment for any property because of the light and airy feel they add to even the darkest room and the extra living space they provide. A bay window can be used in a variety of practical ways to enhance your room and make it more useable. Here are seven tips on making the most of your bay window, written by our home improvement experts.