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I have 2 x identical ceiling lights (each with 5 bulbs) and recently decided to change the G9 led bulbs from bright white to cool white however only 1 of the lights worked. All 5 bulbs failed to light up in one but not the other. I changed back to the old bulbs - all lit up. I swapped the new bulbs from the lamp that was working but still nothing. Both lamps are non dimmable and the switches are simple on/off type. I am completely baffled as I can see no reason for this - can anyone suggest why this might be? Yes, I have tried swapping all bulbs around but the Integral LED G9 bulb refuses to work in the one light fitting. It is a complete mystery- totally baffled.

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  • If you're using a dimmer it could be that one set is dimmerable and the other not – Ack Oct 20 '20 at 22:23
  • No, these are not on a dimmer switch – mossy Oct 21 '20 at 16:55
  • what type of a switch do you have? ... please update the info in the question, not in comments – jsotola Oct 21 '20 at 23:56
  • Just to be sure, do the bulbs from the non-working lamp work in the other one? Do mix-and-match sets of "working" and "non-working" bulbs work in either? Do mixed sets of new & old temperature bulbs work in either? – FreeMan Oct 23 '20 at 12:20
  • Yes, I have tried swapping all bulbs around but the Integral LED G9 bulb refuses to work in the one light fitting. It is a complete mystery- totally baffled. – mossy Oct 24 '20 at 13:19

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