http://www.mymodernmet.com/profiles/blogs/teamlab-crystal-universe
“Crystal Universe” is an interactive art piece that involves the movement of the viewer. 60,000 LEDs are suspended in the 3D space. When a viewer steps into the space, a change is seen in the lights in the entire space and this change will continue to be indefinite with the viewer at the core.
The contractors who set up this installation will definitely has their work cut out for them. 60,000 LEDS was being use so i can only imagine how long they did to install them.