Wiring and circuits
Dimming lights
Dimming lights get dimmer, often for a moment, when a large appliance starts or when a connection or supply problem lowers the voltage.
A brief dim when an air conditioner or dryer starts can be normal in some homes, because large motors draw a lot of current as they start. Lights that dim often, or stay dim, are different. That can point to an overload, a loose connection or a brownout on the utility side.
NFPA lists flickering or dimming lights among signs of an electrical problem. Do not open panels or boxes to look. Call a licensed electrician, and see electrical warning signs. If every home on the street dims, report it to your utility.
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