How to Replace a Light Fixture Safely (Wall Sconce, Pendant or Ceiling Light)

Do I need an electrician to replace a light fixture?

For any hardwired fixture, such as a wall sconce, pendant, chandelier or ceiling light, we recommend hiring a licensed electrician. Rules about who may do electrical work differ by state and city, and some places require permits or a licensed professional even for a simple swap. Check with your local building department.

Call an electrician instead of doing it yourself if any of these apply:

• There is no junction box where the fixture will go, or the box is loose, damaged or too small.
• The wiring is old, has cloth-covered insulation, aluminum conductors, or no ground wire.
• The fixture is heavy, such as a large chandelier, or you are installing it over a high ceiling or stairwell.
• You want to move the fixture, add a switch or dimmer, or add a new circuit.
• You are not sure which breaker controls the circuit, or the wires do not match the instructions.

How to replace a light fixture: the general steps

Understanding the process helps you judge a quote and spot problems. Here is what a professional does, in order. Treat it as an overview, not a do-it-yourself manual, and always follow the instructions that come with your fixture.

1. Turn off the breaker. Switch off the circuit at the main panel, not just the wall switch. Label it, and leave a note on the panel so nobody turns it back on.
2. Verify that the power is off. Use a non-contact voltage tester and confirm that the wires are dead before touching anything. If the tester shows power, stop.
3. Remove the old fixture. Take off the shade or glass, remove the screws holding the canopy or mounting plate, and support the fixture while the wires are disconnected.
4. Inspect the junction box. The box needs to be secure, undamaged and rated for the fixture's weight. For a ceiling fixture, make sure it is properly supported.
5. Attach the new mounting bracket. The bracket that comes with the new fixture is fastened to the box.
6. Connect the wires. The usual pattern is black (hot) to black, white (neutral) to white, and bare or green (ground) to the ground wire or screw. Connections are made with wire nuts or connectors rated for the wire size, then tucked neatly into the box. Always follow the fixture's wiring diagram, since some fixtures use different colors.
7. Mount the fixture. Secure the canopy or backplate to the bracket and install the shade, glass and bulbs.
8. Restore power and test. Turn the breaker back on and test the switch and any dimmer.

Junction box for a light fixture

The junction box is the metal or plastic box in the ceiling or wall that holds the wire connections and supports the fixture. It matters for three reasons:

• Support a box must be rated for the weight of the fixture. Standard boxes support light fixtures, but heavier ones, like big chandeliers, may need additional support. Ceiling fans need a box specifically rated for fans.
• Size a box has to be big enough for the number and size of wires inside it. Overcrowded boxes are a hazard.
• Fit the mounting bracket and canopy that come with the fixture must match the box. A round box usually fits round canopies, and rectangular or octagonal boxes may need an adapter.

If the existing box is damaged, loose or missing, stop and have an electrician replace it.

How to install a ceiling light

A ceiling fixture is attached to a box in the ceiling, so you will be working overhead with your arms raised, which is awkward and tiring. A flush mount sits close to the ceiling and often needs an additional mounting bracket, while a semi-flush hangs a little lower on a stem. Read our comparison of flush mount vs semi-flush mount to decide what fits your room. Then browse flush mount ceiling lights or all of our ceiling lights for options.

How to install a pendant light or chandelier

Pendants hang from a cord, chain or rod. Before ordering, decide how far down the fixture should hang and check the maximum drop and canopy size on the product page. The height is explained for kitchens in our kitchen island pendant light guide, and chandeliers have their own sizing rules. For a heavy fixture, ask the electrician to confirm the box and support. Browse our pendant lights and chandeliers for sizes and drop lengths.

How to install a wall sconce

A wall sconce is usually hardwired to a box in the wall. The first step is deciding on the height, which our guide to mounting wall sconces covers room by room. If there is no box where you want the sconce, an electrician must run new wiring and install one, which can involve cutting into the wall. If you replace an existing sconce, the box is usually already in place. See our wall sconces for dimensions and mounting details.

How to wire a light fixture: what the wires mean

• Black (hot) carries power from the switch to the fixture.
• White (neutral) completes the circuit back to the panel.
• Bare copper or green (ground) a safety path for fault current. It connects to the metal box and to the fixture's ground.
• Red or other colors may be a switched or traveler wire. The right connection depends on how your circuit is wired, so leave these to a professional.

Never splice wires without a proper connector, never leave bare wire exposed and never assume that a switch being off means the wires are safe.

Check the fixture before you buy

Reading the product page will save you trouble later. Look at the dimensions in inches, the bulb base, whether the fixture has an integrated LED, the weight, the canopy size and the maximum wattage. If you are unsure about bulbs, see E26 vs E12 bulbs.

What to prepare before the electrician arrives

A little preparation keeps the visit short and the quote accurate. Take photos of the existing fixture, the ceiling or wall around it, and the breaker panel with its labels. Note the ceiling height, since that affects the ladder and the hanging height of the new fixture. Keep the new fixture's box, instructions and hardware, because the installer will need the mounting bracket and wiring diagram. Clear the furniture under the work area and cover the floor.

It also helps to know whether the fixture is on a dimmer. Not every LED fixture works with every dimmer, so the installer may need to check compatibility or swap the dimmer for one that matches. After the job, ask the electrician to confirm that the fixture is secure and that every connection is covered, and keep any paperwork in case you sell the home.

Frequently asked questions

Can I replace a light fixture myself?

Some homeowners do, but we recommend a licensed electrician for hardwired fixtures. Local rules may also require one.

Do I have to turn off the breaker?

Always. Turning off the wall switch is not enough. Switch off the breaker and test that the wires are dead.

What if my old fixture has no ground wire?

Stop and call an electrician. Older homes can have ungrounded wiring that needs a proper solution.

How long does a replacement take?

It depends on the fixture and the condition of the wiring and box. An electrician can give you an estimate once they have seen the existing setup.