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I have a ceiling fan with light in room A. I have recessed lights in room B.

I noticed that if I have the ceiling fan set as Fan-On and Light-Off, and I switch the fan's wall switch (fan and light is the same switch) to on or off, the recessed LED lights in room B will blink once.

Room B's lights do not blink if I have both fan and light set as on or fan is set to off.

Is this a wiring problem? Or is that some special electrical behavior involving a motor? Could this cause problem with device sharing the same circuit?

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    Are they on the same circuit breaker? – ThreePhaseEel Oct 20 '20 at 11:42
  • Do they blink or just dim slightly? Are they incandescent or LED? When did this start (or is this a new place for you)? – Carl Witthoft Oct 20 '20 at 18:26
  • Yes, they are controlled by the same circuit breaker. The lights in room B are Off. I only noticed it recently because I rarely use the Fan-On/Light-Off configuration. – some user Oct 20 '20 at 19:51
  • Are the lights in Room B incandescent bulbs, CFLs, or LEDs? – ThreePhaseEel Oct 21 '20 at 23:40
  • LED. Will update question. – some user Oct 23 '20 at 6:48

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