Eve lights help outline the bottom horizontal and some diagonal lines to a house. Generally the lights are tucked up under the overhang of the eves or gable.
The Miller Lights
There are many different ways to add this outline to a home. The post popular way is to add the pixel light in J channel. Drill 12mm holes every 2-3 inches and then screw the J-Channel to the underside of the eves. You can get the J-Channel relatively cheap from Home Depot.