The lamp consists of two half-spheres placed on top of each other, with in the middle a round fluorescent tube that emits direct and reflected light. Rare piece. Literature: "Light. Lamps 1968-1973: New Italian Design" by Napoleone and Fulvio Ferrari, Umberto Allemandi & C., 2002. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources 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.