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The Mystery of the Flickering Lights

If a light is flickering, it’s most likely something simple. Here’s a quick way to narrow it down.

Start here

  1. Is it just ONE bulb? Swap the bulb first.
  2. Is it on a dimmer? Some dimmers aren’t LED-rated, and some LED bulbs/lights aren’t dimmable. Check the bulb or fixture; it should be labeled somewhere.
  3. Is it just ONE room? Try a different switch position a few times. A worn switch can act up.
  4. If it’s a lamp, try a different outlet.
  5. If it’s a fixture, see if it flickers when big stuff turns on (microwave, vacuum, fridge cycling). That can point to a loose connection or an overloaded circuit.
  6. Sometimes it could be a switched outlet, either the switch is becoming worn out, or the outlet could be loose from continuous use.

What the flicker tells you

  • Fast strobe or shimmer: usually bulb/dimmer compatibility
  • Slow pulse: sometimes a driver in an LED fixture, or something cycling on that circuit
  • One quick blink when something starts: normal-ish voltage dip, but it’s a clue about what shares that circuit

If it’s multiple lights across the house, or it’s getting worse over time, that’s a good sign it’s worth having someone take a look.


More mysteries: the Dead Outlets | the Breaker That Won’t Stay On | Aluminum Wiring


Still stumped? Call or text and we’ll figure it out.

(720) 339-2016 | info@ilgelectric.com