Flat 4 wires LED rope lights conducted by four copper wires,  forming three electric circuits. When it works with a controller, it also  produces more moving effects than flat 3wires.
It is widely used for decorating or  illuminating your home, or business, creating figure, or building Christmas  sign display in manyoccasions such as corners, ceilings, staircases, decks,  driveways, boats, galleries, clubs, parties and holiday.     http://www.lightdg.com