The offices of Rogers Stirk Harbour + Partners on the 14th floor of the iconic Leadenhall Building, popularly dubbed the “Cheese Grater”, has recently been equipped by Spectral with new LED luminaires. A customised version of the Iris blended ideally into the interior design concept, emanating a unique transparency and lightness into the room with minimal contrast. The special feature of the installation: the system responds to daylight intensity and changes the light colour according to a prescribed profile. Wherever the natural daylight allows, the degree of artificial light can also be reduced to save natural resources. Photos: Newbery Smith Photography