This is a really cool idea, basically, make a wall out of LED bulbs and put some sensors in so that it reacts to humans…well, you can read this description:

The wall includes tracking devices and low-resolution LED displays and is capable of showing many different visualizations based on the presence and movement of people. The 35,000 LED bulb installation is now installed permanently at La Vitrine Culturelle and can be seen every evening from 7 to 11 (145, rue Sainte-Catherine Ouest, Montréal)

So that’s the description, but you really have to see it for yourself:

Link via Urban Prankster.