Take a swarm of Roombas (robot vacuum cleaners), attach different coloured LEDs, set them off on pre-programmed cleaning missions in a room, photograph the whole thing using long exposure.
Presto! Roomba light art.
There’s an entire Flickr photo group dedicated to this kind of thing.
Light artists (from top): Steve Doll, Chris Bartle, Mike Bala and IBRoomba.
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