Many households notice this issue: the ceiling light is silent when off, but produces a slight humming sound when turned on — especially noticeable at night. In most cases, the noise comes from the LED driver. Less commonly, it may be wiring or LED board issues.

Step 1: Turn Off the Power

Switch off the circuit breaker and confirm the light is completely off before inspection.

Cause 1: Aging or Low-Quality LED Driver

The driver is the power core of the light. Loose internal coils or poor filtering can cause humming. Remove the cover and identify the noise source. Replace with a driver of the same voltage and wattage.

Cause 2: Loose Wiring

Check ceiling terminals and lamp wiring. Tighten loose connections to eliminate noise.

Cause 3: LED Board Aging

Blackened or flickering LEDs may indicate board aging. Replace with a same-size LED board.

Cause 4: Incompatible Switch

Illuminated or dimmer switches may cause driver whining. Replace with a standard single switch.

Final Reminder

Do not ignore persistent noise. Turn off power, check driver, secure wiring, inspect LEDs — most issues can be resolved safely and affordably.