Using bird cages as backyard lanterns could be a gorgeous way to light up your summer evenings. Spray paint the cages gold, line the bottom with gold foil (available at art supply stores), and thread a lantern bulb into the cage for a soft yellow light.
Of course, the drama and beauty of Fishing Light, the Luz Interruptus project, can probably never be reproduced; it took the artists two days to install all of the cages along the rail of the bridge in Maubeuge. But there are plenty of photos on their site that document both the installation and the finished product. Their other public art projects, which all in some way involve light and the night landscape, are also fun to peruse.