PH 4-3 Table Lamp part of Poul Henningsen’s three - screen family range of lamps from Louis Poulsen, which now numbers 21 lamps, including 3 for outdoor use. Poul Henningsen designed the 3 - screen system as early as 1925 to 1926, where PH in collaboration with Louis Poulsen signed the first lamps for an exhibition in Paris.