You can use these tam-tam lamps either as wall or ceiling lamps. Created by a japanese designer named yoshiko hasabe in circa 1974. Produced by gh meblo, which was a part of the guzzini brand. The design features a half-sphere that consists of a metheacylate shade and a white metal wall plate. The shade is partially faded to create a diffuse light. Takes one e27 light bulb (not included). A standard e26 american/canadian size also fits (tested). We think it works best in combination with mirrored bulbs but will take any e27/e26 bulb. 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, up to 250v (europe/uk standard).the wiring of this item may be original and might need replacement, if not specified otherwise.