The lamp socket is designed for standard E27 light-bulb (not included) but also takes your standard E26 size (tested).Works with 220v as well as 110v. This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution, European Plug (up to 250V).The wiring of this item may be original and might need replacement, if not specified otherwise.