A flickering light could simply be the result of a loose bulb, so start by turning it off and tightening the bulb. See if your circuit is overloaded. If so, plug the light into another outlet. Unplug the light to make sure the bulb is touching the metal contact tab at the bottom of the light socket.
In this manner, why is light bulb flickering?
Loose wiring is the most serious reason for flickering lights and a main cause of house fires. Shut off the light at the circuit breaker before removing the fixture to double check the wiring. If the fixture looks like it might be loose or insecure, it's time to call an electrician.
Can flickering lights be caused by a bad breaker?
Old breakers can also cause flickering. Similar to your home's electrical systems, the wiring in your breakers can go bad over time. Faulty breaker wiring can short and overheat, which can cause flickering.
Why do lights flicker at night?
Lights, such as stars, flicker for the same reason that you get this pattern at the bottom of a swimming pool. Like the water, the atmosphere is moving around and warping the light-waves as they travel trough the air. This warping is also driven by temperature and pressure differences in the atmosphere.
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