I dropped onto the Guerrilla Lighting Installations through the Architecture website
Dezeen, its a series of installations set up in Madrid by
Luzinterruptus. His website is in Spanish but there are some English parts and its worth a look. A couple of installations kind of reminds me of a large inflatable Elephant that a student did for his FMP a couple of years ago. Luzinterruptus is anonymous collective art. They
carry out urban installations in public spaces and use light as raw material and the night as our canvas.
The three members of the team come from different backgrounds such as art, lighting and Photography and they apply their creativity in a common action , leaving lights on in protest, so that other people turn them off.