I've recently moved house, and there is a wall lamp, see picture, which we never use, and i was wondering if i could put a usb socket there instead so i could charge bike lights and similar accessories.

Is this possible? Safe? Stupid? I have no clue, so any help would be appreciated.enter image description here

  • There are Edison A19 screw-in USB chargers (usually extending the socket for use with a bulb also)
    – Joe
    Dec 16, 2019 at 19:58
  • 1
    What sort of box is behind the fixture?
    – isherwood
    Dec 16, 2019 at 20:00

2 Answers 2


While there are other options involving wiring, the safest option that does not involve an electrician is a light bulb to outlet adapter. Here, the version for use in countries with Edison base A19 bulbs:

Screw in outlet adapter for lamp fixture Edison base A19

Someone else can add advice for other regions. In the case of a USB socket a third prong is generally not required, though chargers in the UK generally have a plastic fake third prong anyway.

  • These things cost less than $2. There are also versions that allow you to keep the bulb socket, but add an electrical plug socket.
    – gbronner
    Dec 16, 2019 at 23:59

There are several types of screw up in lamp adapters for usb charging... this one keeps the bulb socket and offers a switch for turning it on and off as well...


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