Installing a Wall Sconce for Accent Lighting

Wall sconces do more than add light—they reshape how a room feels. A pair flanking a mirror in the bathroom creates spa-like balance. One beside a reading chair pulls that corner into focus. But unlike a pendant you simply hang from an existing ceiling fixture, a sconce requires its own power run, which means drilling into walls, fishing wire through framing, and making a real electrical connection. Done right, the sconce looks intentional and purpose-built. Done wrong, it's a fire hazard with loose connections hidden behind drywall. This guide walks you through running the wire, installing the box, and finishing the connection so the fixture works reliably for decades. The trickiest part isn't the wiring—it's routing the power supply to the wall where you want it. You'll run Romex cable from an existing circuit, fish it through walls (or surface-mount it if you prefer visible conduit), and land it at a new electrical box where the sconce will mount. From there, the actual fixture installation is straightforward. You'll need a power drill, a voltage tester, and the willingness to cut holes in drywall and patch them afterward. If the nearest circuit is far away or behind plaster rather than drywall, you might call an electrician. Otherwise, this is well within reach for anyone comfortable with basic hand tools.

1. Kill Power First. Identify an existing outlet or light fixture near where your sconce will go that's on a circuit with available capacity. Turn off that breaker at the panel. Test the outlet or fixture with a voltage tester to confirm power is dead. Mark the breaker with tape so no one accidentally flips it back on while you work.
2. Mark Your Spot. Hold the sconce mounting bracket against the wall at your desired height (typically 60 to 66 inches from the floor to the center of the sconce for eye-level accent lighting, or lower around 48 inches if mounting beside a mirror). Use a level to mark the vertical centerline with a pencil. Mark the stud location behind the wall with a stud finder if you're mounting on drywall over stud framing.
3. Map the Route. Plan the most direct path for Romex cable from your power source to the sconce location, staying along studs and inside walls when possible. Avoid crossing over plumbing lines or existing electrical conduit. If the route requires going through multiple walls or long horizontal runs, mark the path with pencil on the wall studs so you know where to drill access holes and fish the wire.
4. Cut the Box Opening. Use a drywall saw or hole saw to cut an opening for the electrical box at your marked location. The hole should be sized to match your box (typically 2.75 inches wide for a standard single-gang box). Cut cleanly through drywall only, not into the stud behind it. If you hit a stud, use a chisel to carefully notch it or move the hole slightly to the side of the stud.
5. Run the Wire. If running cable through walls between studs, drill a ½-inch hole at the source location (outlet or fixture box), then drill a second hole at the sconce location. Run a fish tape or stiff wire through the wall cavity between the two holes, attach the Romex cable to the fish tape with electrical tape, and pull it through. If the cable can't be fished (blocked by blocking, brick, or plaster), surface-mount it using plastic conduit and conduit clips along the wall studs or ceiling edge. Leave at least 12 inches of slack at the sconce end.
6. Set the Box. Push the electrical box into the hole at the sconce location, with the cable entering through a knockout hole in the back of the box. Secure the box to the drywall using the integral nails or screws on the sides of the box, or use a simple Madison clamp if the box doesn't have mounting tabs. Tighten until the box face is flush with the finished drywall surface. If you hit a stud, use a box designed for stud-mounted installation and screw it directly into the stud.
7. Connect at Source. At the source outlet or fixture box, turn off the breaker again and test with a voltage tester to confirm power is off. Carefully remove the cover plate and unscrew the outlet or fixture from its box. Strip ½ inch of insulation from each conductor on the new Romex cable. Connect the black (hot) wire to the same terminal as the black wire from the source (usually a brass screw on an outlet). Connect the white (neutral) wire to the silver screw alongside the source white wire. Connect the bare copper ground wire to the green screw. Push everything back into the box, screw the outlet or fixture back in place, and reattach the cover plate.
8. Prepare the Wire. Pull the Romex cable fully into the sconce electrical box, leaving about 6 inches of wire to work with. Use a utility knife to strip 2 inches of the outer sheathing from the Romex, then strip ½ inch of insulation from the black, white, and bare copper wires. Leave these wires straight and ready to connect to the sconce terminals.
9. Wire the Fixture. Most sconces have two or three terminals (or a wire connector block) mounted inside the fixture housing. Connect the black wire from the wall to the hot terminal (usually marked or colored brass). Connect the white wire to the neutral terminal (usually marked or colored silver). Connect the bare copper ground wire to the ground terminal (usually green or marked G). If the sconce uses push-in terminals, push the stripped wire straight in until it stops. If it uses screw terminals, wrap the wire clockwise around the screw, then tighten the screw down firmly.
10. Test Before Mounting. Turn the breaker back on. Use a voltage tester to confirm power is present at the sconce box. If you have a switch controlling this circuit, flip it to test that the light operates. Once you're certain power is working and the fixture illuminates, turn the breaker off again to mount the sconce permanently.
11. Mount the Sconce. Turn the breaker off. Position the sconce mounting bracket over the electrical box and align the screw holes. Drive the mounting screws through the bracket into the threaded holes in the electrical box, tightening firmly but not stripping them out. Once the bracket is secure, slide or bolt the sconce body onto the bracket according to the manufacturer's design. Some sconces slide on, others clamp or bolt.
12. Patch and Finish. If you drilled any extra holes or made exploratory cuts, patch them with drywall spackle using a putty knife. Sand smooth when dry, then prime and paint to match the wall. If you surface-mounted conduit, install trim rings or escutcheons around the conduit where it meets the wall to finish the appearance.
13. Light It Up. Turn the breaker back on. Install the appropriate bulb in the sconce (check the fixture label for wattage and type—LED, incandescent, or halogen). If the sconce is on a wall switch, flip the switch to test. If it's hardwired always-on, verify that it illuminates. Check that the light is oriented as intended and that there are no loose wires or connections visible.