Main information
What it could mean
A hum from a lamp can come from the driver or transformer itself (in LED or halogen lamps), an incompatible dimmer, or a poor contact at the light point.
Safety first
Not usually a serious electrical risk, but worth checking if the hum comes with flickering or heat.
Next step
Assessed whether the source is the lamp itself, the dimmer, or the light point's installation.
Frequently asked questions
Why do some LED lamps hum with dimmer switches?
Many LEDs aren't compatible with all dimmers; the hum usually indicates an incompatibility between the two.
Could the hum indicate a more serious problem?
If it comes with flickering, heat, or smell, yes, worth checking more closely.
Is it fixed by just changing the lamp?
Often yes; if it persists with another lamp, the problem's the dimmer or the light point's installation.
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