At the end of the nineties, Renzo Piano created a museum with a discreet and calm aesthetic for the Fondation Beyeler in Riehen near Basel. A light glass roof floods the museum with natural light. At the time, the exhibition rooms were additionally equipped with an elaborate false ceiling, which, in addition to daylight, directed diffuse artificial light into the room. With the renovation of the extraordinary museum building and the associated renewal of the lighting, there was the requirement to obtain a premium light in terms of quality and technology. By means of wallwashers installed in the false ceiling, an indirect general lighting is created, which supports the daylight with the high color rendering. Thus, the experience of the room and the art, regardless of the time of day, is consistently pleasant.