A lighting system for illuminating stairs and a method for installing the same. The wiring for the lighting system may be hidden from view, providing a more aesthetically pleasing appearance. Furthermore, the lighting system may be installed simultaneously with the deck itself, or afterwards. Embodiments of the present invention include stair riser lights which extend only minimally from the front surface of the stair riser. Embodiments of the present invention may focus the light towards the horizontal surface in front of the stair riser. Embodiments of the present invention may also protect the lighting system from environmental damage. Embodiments of the installation method include utilizing a jig so that the light assembly may be quickly and accurately installed.