'Light from the hole' - the lighting concept in the chancellor's office can be summed up with this minimalistic formula. A special, rotationally symmetric housing for recessed mounting in concrete accommodates the downlights. The actual lamp fitted and the characteristics are different for each downlight: Depending on the purpose of use, metal halide lamps or, as here in the NATO hall, dimmable halogen lamps are used. All ceiling apertures have a uniform diameter of 170mm. The lamp cover is recessed 2cm into the ceiling and provided with an expansion joint.