This may work for stairs on garage-Energy efficient LED stair lights by Trex Deck Lighting. Looks good and serves a great purpose. Led lighting is bright and uses much less energy then the regular lights people are used to.
Horizontal-Railing-by-Milk-and-Honey-Home To build our railing we used four by four posts and two by six boards for the rails. It took a day to build and install, and even before primer and paint, it looked light years better.