A skylight covers the historic foyer. The original backlighting with linear fluorescent lamps did not give off any luminance and caused irritating images on the radial glass panes. The pendant luminaires placed at intervals give off a warm light in the interior space and form rings in the listral glass panes.

The sculpture by Frank Stella was examined using extensive light tests while still in storage at the art dealer’s in order to determine its range of effects. The empirically established light positions were geometrically transferred to the foyer and the lighting fixtures installed before the piece of art was mounted.

A tunnel passageway is turned into a scene of mixed colors through the lighting and color design. One enters a blue tunnel, but along the way the blue of the accordion-like walls loses its saturation and becomes superimposed by a yellow that increases in its intensity. On the way back, the experience replays itself in reverse.