Tina Jørstian and Poul Erik Munk Nielsen, eds., Light Years Ahead: The Story of the PH Lamp, Copenhagen, 2000, pp. 154, 157 for drawings, pp. 181, 190, 225
circa 1931 Patinated copper, metal, painted glass. Each: 25.2 x 20.1 x 32.9 cm (9 7/8 x 7 7/8 x 12 7/8 in.) Manufactured by Louis Poulsen, Copenhagen, Denmark. Each light fixture impressed with PATENTED/P.H.-2.