The last thing American light artist James Turrell would do with a building is floodlight it. He believes that buildings should glow from within. Turrell's idea was therefore to illuminate the elevator shaft in the new high-rise "Gallileo" building and the two stairwells in the adjacent 1970s tower - but not just in one colour. The colour changes in the course of two hours, producing a unique nighttime composition of different colours and light intensities, and bringing the buildings to life after dark. Daylight plays special role in the Gallileo building. 

Czech-born light artist Magdalena Jetelovà has created a number of "incidental" lighting effects for the 18-metre high, glazed atrium. Light is activated whenever the landings and stairs between the six floors are used by the inmates. Linear cold cathode lamps located in the interactive spaces switch on to show when the stairwell is in use. The pulsating rhythm generated by the lines of light marks the paths used to link the different parts of the building.