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Lights Buzzing

Buzzing lights may be caused by dimmer incompatibility, an LED driver issue, a loose connection, or a fixture or ballast problem.

Quick summary

A light should not normally make obvious buzzing sounds. Sometimes the cause is a dimmer or bulb mismatch. Other times, the sound points to a loose connection or a fixture component that is failing. The louder or more persistent the noise is, the more seriously it should be taken.

Common causes

An incompatible dimmer and bulb combination may cause buzzing, especially with LEDs.

An LED driver or internal fixture component may be failing.

A loose connection at the switch, fixture, or another point on the circuit may create noise.

An older ballast or fixture part may be wearing out and becoming noisy.

Safe checks homeowners can do

1

See whether the buzzing happens only at certain dimmer levels or all the time.

2

Try a known compatible bulb if the fixture uses replaceable lamps.

3

Notice whether the sound is coming from the switch area or the fixture itself.

4

Check whether the buzzing comes with flickering, dimming, or unusual warmth.

When to stop and call an electrician

  • Stop if the buzzing is paired with heat, a burning smell, sparks, or repeated breaker trips.
  • Stop if the buzzing grows louder or starts affecting multiple lights.
  • Call a licensed electrician if you suspect a loose connection or a failing device inside the circuit.