Let there be holograms
'Parade of Holonzki' by Ingo Maurer and Eckard Knuth is a fantastic artwork. This detail shows just one hologaphic lightbulb, sitting in its all too real socket.
In fact, there were a wall of them. As you walked along, the ones nearest you would turn 'on' and the ones left behind would turn 'out'. Lots of fun.
Found on the other side of the foyer from these artworks.