You plug lights into them which provides soft lighting when watching TV etc.
You might find that those sockets are on a lighting circuit and operated by a light switch. I might be worth checking that first. Some people (me included) think that a switchable set of lighting sockets is a good idea.
And me!!
I've thought before about installing some - still undecided about if they are useful enough to warrant the effort, but if I already had them then I would definitely keep them.I agree these are really useful
I'm surprised to see the wiring like that, with the 2 blue wires just floating. Do the sockets actually make a lamp light? It seems a waste of cable to wire it in the way it is but not use those blues, unless they were left for something else...
If you replace a 2-gang switch with a 1-gang then you will end up with everything on the one switch, all on or off together, which won't be at all what's needed if you do ever use the sockets for table or floor lamps.
Why not get a 2-gang?
Keep the same set up. If you put a round pin plug on a table lamp, plug it in, and see how effective it is, taking notice how easy it is to turn on by the door as you come in, you won't want to get rid of them.
Yes, the separate connections also allows the two halves to be on completely different circuits, or wired on a multiwire circuit to provide 2 x 15A over only 3 wires (obviously something else impossible there on single-phase supplies). I sometimes wondered why no manufacturer (at least that I'm aware of) ever made a double 13A socket as a single unit with separate terminals for each socket.I guess that works well with your 15A lighting/socket circuits.
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