Swapping a light fixture is one of the easiest electrical DIY projects for a homeowner. Here's how to do it safely, even if you've never touched wiring before.
Replacing a light fixture — swapping an old ceiling light, pendant, or chandelier with a new one — is a beginner-friendly electrical project that most homeowners can do safely in under an hour. Here's how.
Don't just flip the wall switch — turn off the breaker for that circuit at your electrical panel. Then use your voltage tester to confirm the power is off at the fixture before you touch any wires. This step is non-negotiable.
Most fixtures are held by screws at the base plate or canopy. Remove the screws, lower the fixture, and locate the wire connections inside the electrical box. You'll see wire nuts connecting the fixture wires to the house wires. Take a photo before disconnecting anything.
Unscrew the wire nuts and separate the connections. You'll typically have: black (hot) to black, white (neutral) to white, and bare copper or green (ground) to bare copper or green. If the old fixture had a ground and the new one does too, connect ground to ground.
Your new fixture likely comes with a mounting bracket. Compare it to the existing one. If the new bracket doesn't fit the existing electrical box configuration, you may need to replace the bracket — instructions are in the box.
Connect black to black, white to white, and ground to ground using wire nuts (usually included with the fixture). Twist clockwise until tight. Give each connection a gentle tug to confirm it's secure. Wrap with electrical tape for extra security.
Tuck wires carefully into the electrical box, attach the mounting bracket, and secure the fixture canopy or base plate. Restore power at the breaker and test before installing bulbs.
Call a licensed electrician if: there's no ground wire in the existing box (common in older Boston homes), the wires look burned or damaged, the electrical box is loose or undersized for the new fixture's weight, or you see anything that doesn't match the simple black/white/ground configuration described above.
If you'd rather have a pro do it, a licensed electrician in Boston typically charges $150–$300 to swap a single fixture, including labor and any needed hardware. For multiple fixtures at once, many will offer a flat rate for the day.
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