The hemispherical shade is made of brushed aluminium with white plastic diffuser inside. The lamp requires one E27 bulb. All types of light sources can be used (LED, energy-saving lamps, etc.) . This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I 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.