Poul Henningsen - Louis Poulsen - Pendant Lamp PH 4/3 1930’s Poul Henningsen: “PH-4/3 Pendant with patinated metal bayonet socket house. Marked Patented with opal glass screens Description “PH 4/3. Pendant with patinated metal bayonet socket house. Marked Patented and opal glass shades. This example manufactured 1930’s by Louis Poulsen. Literature: “Light Years Ahead” Wear and patina due to age and use. Concept: The fixture is designed based on the principle of a reflective three-shade system, which directs the majority of the light downwards. The shades are made of metal and painted white to ensure uniform, comfortable light distribution.