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I was looking to fit some Philips Hue LED bulbs, but they only come with Edison screw fittings (E27) and every light fitting in our house is bayonet (B22). I initially looked into using adapters but I was concerned about the quality and couldn't find a reputable brand. Is this something that I can change myself? For the avoidance of doubt, I live in the UK and I am not a qualified electrician.

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    It is worth mentioning that Philips Hue now come with B22 (bayonet) fitting as well. Jan 31, 2017 at 10:01
  • I was curious so I looked it up, and for the avoidance of doubt, in case anyone reading this question is wondering, replacing a light fitting is non-notifiable under Part P of the building regulations and therefore does not require a qualified person to either do the work nor to certify it as sound.
    – Tom W
    Dec 27, 2017 at 12:10

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it's usually pretty easy to change the fittings:

  • make sure electricity is off (turn off the breaker that powers the light)
  • double check the electricity is off
  • loosen the screws that hold it up on the ceiling and keep the wires attached. Remember which wire is connected to the ground (bare/green or yellow green striped wire), live (red, orange or blue wire) and neutral (black wire) connections. If your house is newer then the colors may be different: green/yellow stripe for ground, brown/black or gray for live and blue for neutral
  • connect the wires as indicated in the manual for the new fitting
  • attach the new fitting to the ceiling
  • put in new bulb
  • turn electricity back on, if the breaker doesn't want to stay on you did something wrong and should inspect what you did wrong before trying to "fix" the breaker.
  • toggle the switch and bask in your accomplishment.
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It is quite easy as ratchet freak described. The only problem is if your old lamp shade or similar will still fit. E27 is wider.

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DO NOT USE A B22 TO E27 CONVERTER!!! You can put a bayonet bulb in either way and it still works because the two pins are underneath. The E27 only has ONE pin for live, BUT, put a converter in one of the two ways and the screw section may be LIVE - you might be able to touch the outer live area as you screw in the bulb.

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    I'm having a hard time picturing what you're saying. Could you find a picture somewhere online or make a rough drawing of what you're talking about? Editing that into your answer would help it tremendously.
    – FreeMan
    Apr 7 at 13:21

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