The installation by the Canadian artists Catlind r.c. Brown and Wayne Garrett is called ‘CLOUD’. It is an interactive cloud project that consists of 6,000 new and burnt-out lightbulbs. Made of metal pull string switches and everyday lightbulbs, the large-scale sculpture creates an immersive environment that invites viewers to wander through the rain strings switching lights on and off. CLOUD was first created for art festival Nuit Blanche Calgary (in Canada) in 2012 and has since been shown in The Netherlands, Russia, Singapore, Israel and Portugal. Follow these two artists on Facebook.