The Monorail 2-Circuit 4 Inch Round End Feed Canopy by Edge Lighting Monorail 2-Circuit 4 inch round direct end feed canopy mounts to a wall using a standard 4 inch electrical box and powers the rail directly from either end. Mount canopy at least 6 inches from the ceiling. Use with 6 to 96 inch standoffs. Finish in satin nickel, polished nickel, or antique bronze. ETL listed.