'Sigma' Wall or Ceiling Lights by Sergio Mazza for Artemide. Designed and manufactured in Italy, circa 1960s. Patinated nickel plated brass, halophane glass. Custom back plates. Rewired for U.S. standards. We recommend three e27 40w maximum bulbs per sconce. Bulbs provided as a one time courtesy. Priced and sold individually, not as a set.