Zeiss ikon mercury mirror glass pendant by adolf meyer aluminum top 2 meter black cotton flex all lamps have been made suitable by international standards for incandescent light bulbs, energy-efficient and led bulbs. E26/e27 bulb holders and new 110 volt or 220 volt wiring are ul listed or ce certified. 100% safe. e27 / e26 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.