Takes one standard e27 light bulb (not included). A standard e26 american/canadian size also fits (tested). Works with 220v as well as 110v. Rewired with a long black electric cable. we believe a 12cm diameter milky white bulb is the best fit for this lamp (bulb in the photos), you can however use whatever bulb with e27 screw (for size perception, standard diameter is 6cm). A half chrome dome bulb would also look pretty good on this model! 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, up to 250v (europe/uk standard).the wiring of this item may be original and might need replacement, if not specified otherwise.