Windows can make your basement more visually pleasing and improve safety. Large basement windows, sometimes called "egress windows," from Pella of St. Paul are built to let more light into underground rooms than the older, smaller, rectangular windows that are put above ground. They also offer a way out in case of an emergency.
The biggest difference between basement, or egress, windows and standard windows is that basement windows have to be made for an average-sized person to escape through in order to meet safety requirements set up in building codes. You can select from appropriately sized casement, sliding or double-hung windows when you put in basement windows. Make certain that you fully understand local building codes prior to purchasing basement windows.