PH 4/3 table lamp from Louis Poulsen is a beautiful reading lamp designed by Poul Henningsen for Louis Poulsen. All three shades are made of pressure-turned aluminum with a white lacquered interior that provides a soft downward and completely glare-free light. The iconic three-shade system was designed by Danish Poul Henningsen, who, in collaboration with Louis Poulsen, designed the first PH lamps in 1925-1926 for an exhibition in Paris. Here, he used a scientific perspective as the lamp is built based on the logarithmic spiral, a mathematical spiral curve that occurs in many places in nature. This provides an even distribution over the entire curve of the shade. The numbers of the PH lamps refer to the size of the shades, and the letters come from the designer's initials. Feel free to explore the wide range of PH lamps.