Warehouse of Tiffany LD4039 is a lighting fixture that requires professional installation. It is equipped with a mounting plate that attaches to an outlet box using screws provided with the box. The fixture wires are threaded through a hole in the center of the mounting plate and connected to the outlet box supply wires using wirenuts. The fixture is then mounted by aligning the mounting holes in the canopy with the mounting screws and threading ball nuts onto the screws. The canopy is then tightened to firmly hold it in place against the wall.