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Shackleton, will probably still be 25 per cent better than the new standard due out in October. ‘The thermal design and optical components that are used are arguably as big a step forward in terms of the technology as the original step forward in change of appearance,’ he says.

Three areas have been addressed in order to achieve this effi ciency, according to Manfred Petschulat, Zumtobel’s product management director for interior commercial luminaires. ‘First the centre optic has been changed completely to allow a lot more light through it. Second, the diffusers in the light chambers have been changed from opal to prismatic. Third, we have cooled light sources to the optimum point. The combination of these three aspects adds up to the improved performance.’

The key, says Petschulat, has been achieving those levels of effi ciency without compromising the quality of the light which has always been the Mellow Light’s selling point.

Aesthetically, designer James Irvine, former partner of Ettore Sotsass, has softened the edges, blurring the boundary between fi tting and ceiling.

‘I moved away from the language of the steel box,’ says Irvine. ‘My idea was that when you look into a room where there are hundreds of them the impression you would get is less a chequerboard of boxes that were illuminated, but a mellower impression.’

Or as Petschulat puts it: ‘The technology is inside. We didn’t want it to look like a machine.’

For more information please visit www.zumtobel.com/ml-preview

‘My idea was that when you look into a room where there are hundreds of them the impression you would get is less a chequerboard of boxes that were illuminated, but a mellower impression.’

Designer James Irvine

www.cibsejournal.com

April 2010 CIBSE Journal

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