These wall-lamps or sconces were designed by Claus Bolby and manufactured by his own company Cebo Industri in Denmark. The lamps come with a composition of yellow acrylics blocs/bars, melted together with inclusion of air bulbs. When the lamp is on, greenish light effects become visible behind the yellow blocks. Following a lot of experimentation, Claus Bolby became a specialist in the handling of acrylics. All his lamps are unique and handmade. The lamps are in nice vintage condition and in good working order. 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.