The lamp socket is designed for standard e27 light-bulb (not included) but also takes your standard e26 size (tested). We will provide all american/canadian customers with a plug adapter (eu to us) or change the plug to a vintage looking plug (when ordering let us know your preference). All free of charge. Works with 220v as well as 110v. up to 250v (europe/uk standard).the wiring of this item may be original and might need replacement, if not specified otherwise.