PH 5 & PH 50 by Poul Henningsen for Louis Poulsen

PH 50 pendant lamp, white + pale rose matte.
PH 50 pendant lamp, white + pale rose matte, detail.
PH 50 pendant lamp, army + dark grey matte, detail.
PH 50 pendant lamp, army + dark grey matte.
Conference area with PH 50 pendant lamp.
Dining area with PH 50 pendant lamps.
PH 50 pendant lamps.
Workspace with PH 50 pendant lamps.
PH 50 pendant lamp, pale rose + green matte, detail.
PH 50 pendant lamp, dark grey + turquoise, detail.
PH 50 pendant lamps.

Description / details

Poul Henningsen developed the PH 5 in 1958, in response to constant changes to the shape and size of incandescent bulbs. At the introduction of the PH 5, Henningsen wrote the following: After 33 years of basically Christian behaviour, I have converted to Islam in my relationship to the manufacture of incandescent bulbs. For a generation I have believed that consideration for the consumer and common sense would prevail, but now I have become a fatalist. I have accepted fate, and with Louis Poulsens permission, I have designed a PH fixture which can be used with any kind of light source, including, Christmas lights and 100W metal-filament bulbs (although a fluorescent tube would be too much to ask in the existing form). The PH 5 was introduced as a classic new product and no one knew at the time that it would eventually become synonymous with the PH brand. Regardless of how the light is installed or the light source used, the PH 5 is and remains completely glare-free. The fixture was christened pH 5 due to the 50 cm diameter of the main shade. Henningsen wanted to improve the colour reproduction characteristics of the light source in the PH 5. Small red and blue shades were therefore inserted to supplement the colour in the part of the spectrum where the eye is least sensitive: the red and blue areas, thereby subduing the light in the middle yellow-green region where the eye is most sensitive. The PH 5 design has been regularly updated as light sources have developed. The PH 5 plus, designed for use with energy-saving bulbs, was introduced in . To achieve higher efficiency, the metal plate was replaced with frosted glass and the light was painted using a purer white colour. To mark the 50th anniversary of the PH 5 in , the PH50 (a high-gloss version in five new colours) was introduced. The fixture provides 100% glare-free light. Its design is based on the principle of a reflective three-shade system, which directs majority of the light downwards. The fixture emits both downward and lateral light, thus illuminating itself. In the PH 5 Classic, a warmer tone of light is created by the inside red cone and a small blue reflector.

Louis Poulsen
Poul Henningsen
Aluminium, glass
Army + Dark grey matte / Dark grey + Turquoise matte / Pale rose + Green matte / White classic matte / White + Pale rose matte / Chili red gloss / Coconut white gloss / Mind blue gloss / Olive black gloss / Wasabi green gloss
Ø 50 × H. 28.2 cm
Light source
15W E26 A19 LED
200W E26 A23 IF

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