Lamp is designed to be attached to a surface. It can be adjusted in two axis: up-down and sideways. It uses one E27 type bulb. Modern led bulb is attached at this moment. Shade diameter: 7 cm. Base dimensions: 8 cm x 11 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, European Plug (up to 250V).The wiring of this item may be original and might need replacement, if not specified otherwise.