This is the Dexia building in Brussells - with some pretty cool interactive lighting. By night it becomes the focal point of the city - seen for miles, when all 4,200 windows of this building, which are equipped with RGB LED’s, illuminate.

But where it gets interesting, is anyone can go and interactively stamp their mark on the tower for a few minutes, using any combination of colors, shapes and animations using the touch screens downstairs. The LED’s can be switched on or off, and form different colors as required to create pretty much any effect. Even writing or images (comparable to pixel art I guess - I didn’t see any). A remote camera captures the image of the tower with your lighting effect.

And although it sounds like it consumes more electricity than the rest of the city, the architects claim the building uses a third of the electricity the Eiffel Tower uses. To allow these low-powered LED’s to light up the building properly, all the window blinds automatically close before the lighting extravaganza starts each evening. It lasts 5 hours in the summer, and 9 in the winter - and appears to start at 9pm.