Louis Poulsen PH 5-4½ & PH 6½-6 Suspension Lamp

Louis Poulsen PH 5-4½ & PH 6½-6 is a lamp designed by Poul Henningsen in 1931. This pendant lamp is part of the series of lamps designed by Henningsen in the late '20s and early '30s and featuring his famous three-screen system, so the initials "PH" are accompanied by a number indicating the size of the main screen of the pendant. Henningsen, therefore, designed not just one lamp, but an entire system: about a thousand different models have been produced over the years. Thanks to this type of design, Henningsen was able to achieve a uniform distribution of light over the entire curve of the screen. This uniform distribution, together with the diffuse reflection through the glass, allowed him to control glare and shadows. Each screen reduces the amount of light to the same extent due to their distance from the light source. The PH 5-4½ & PH 6½-6 four-screen lamp was designed to increase the amount of horizontally diffused light and illuminate walls and shelves, more than was possible with a standard three-screen lamp. The funnel shape of the upper shade on the fixture provides illumination of the area above the three shades, which primarily directs the light downwards.

Finish
White.

Materials
Shades: Spun aluminum.
Anti-glare disc: Blue, spun aluminum.
Struts: Rolled aluminum colored.

Sizes and weight
Width x Height x Length (mm)
466 x 318 x 466 Max 3.6 kg
650 x 500 x 650 Max 8.6 kg

Light source
Light source 1x70W E27