Lamp uses one lightbulb, type E27. Given dimensions are for the lamp set at 90 degree angle. Lampshade diameter: 11.5 cm Base diameter: 9 cm 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.