The Bubble Lamp (1952) began as a contemporary version of silk-covered ball pendant lights. Inspired by the process the military used to mothball ships, design director George Nelson fashioned a circle from steel wire, placed it on a spinning turntable, and then shot translucent plastic at the sphere until it was fully covered. Thus, the first "Nelson ball light" was born. Bulb (not included): LED, CFL, or incandescent; E26 base; 60W max for small, 150W max for others. UL Listed. Provides soft, glowing light. Transparent plastic polymer shade with visible steel infrastructure. Organic shape. Brushed, nickel-plated steel details. Materials: Steel frame with a translucent plastic polymer shade and brushed, nickel-plated steel details Dimensions: Small: 12.1 H x 12.9 Dia. inches; Weight: 4 lbs Medium: 15.6 H x 19.1 Dia. inches; Weight: 6 lbs Large: 23.5 H x 26.9 Dia.: 9 inches; Weight: 9 lbs Light Source: Bulb (not included): LED, CFL, or incandescent; E26 base; 60W max for small, 150W max for others. UL Listed. Downloads: Herman Miller Warranty Information Assembly Instructions