Project team:


Lichtkonzept: Omarini Architecture – Yves Omarini and Micello Marco
General contractor: Implenia Entreprise Générale SA – Tam Linh Chau
Construction and supply: Belux AG, Birsfelden/CH – Eduardo Lopez; Patrick Zulauf; Benny Riz
Installation: Belux GmbH and Vertige Concept, Yverdon/CH

 

Technical data:


12-metre Cloud
Dimensions 3 x 3 metres
Light source: 60 42 watt TC-TEL 827
Luminous flux: 192 000 lm
30 electronic ballasts, DALI
Total power load: 2700 watts

9-metre Cloud
Dimensions 3 x 1.5 metres
Konstruktion in die Vertikale aufgebaut.
Light source: 36 42 watt TC-TEL 827  #
Luminous flux: 115 000 lm
18 electronic ballasts, DALI
Total power load: 1620 watts

3-metre pear-shaped Cloud
Dimensions 3 x 3 metres
Light source: 20 42 watt TC-TEL 827
Luminous flux: 64 000 lm
10 electronic ballasts, DALI
Total power load: 900 watts
Total power load of light sculpture: 5.2 kilowatts
Total luminous flux: 371 000 lm
Light output ratio: 60 per cent

05. Mar 2013

The Cloud
Atrium in the UBS bank in Geneva/CH

Text: Joachim Ritter
Photos: Belux AG

When we talk about daylight we seldom include clouds in our vision. And yet there are few people watching clouds in the sky who fail to sense some kind of aesthetic pleasure in defining their shapes – provided they are clouds of the cumulus type. These are clouds we see on a sunny day: that is to say over the summer months when we are glad of the shade these clouds offer from time to time. And when we describe dynamic light biologically stimulating light, then a cumulus cloud may well be involved.

Cumulus are isolated clouds. They look like cotton wool – thick and fluffy, but with relatively clearly defined edges. The “piles” of water vapour resemble hills, domes, or sometimes even towers. The sections of cloud that receive sunlight glow bright white. The lower sections of the clouds facing away from the sun are comparatively dark and form practically horizontal base lines. Sometimes the cumulus clouds look as if they have been torn into shreds.

The idea of building an artificial cloud in an atrium with a glazed roof is actually not that absurd. It is after all one way of illuminating the interior spaces in and around the atrium. In the case of the newly designed customer service area in the UBS bank in Geneva – the financial centre of Switzerland – this was the very idea: to provide shade and to keep the strong rays of incident midday sunlight at bay. And the cloud also needed to glow from within. The result is a cloud sculpture that incorporates electric light that controls the influx of natural light and provides diffuse ambient lighting in the darker hours of the day. […]

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The full version of the article can be found in PLD No. 86.

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