Basic Form is a suspension lamp in metal with a round sphere in opaque white glass.‎ The light source is a bulb with an E14 socket.‎Technical specifications:MOD321PL-01B: E14 - 40W - 220-240V - IP40 / Matte white - WhiteMOD321PL-01B1: E14 - 40W - 220-240V - IP40 / Matte white - WhiteMOD321PL-01G1: E14 - 40W - 220-240V - IP40 / Gold - WhiteMOD321PL-01W1: E14 - 40W - 220-240V - IP40 / Matte white - White