John Hart
Collin McCanna, a gallery assistant with the Madison Museum of Contemporary Art in Madison, Wis., sweeps the floor in front of an LED light panel by American artist Leo Villareal at the museum Wednesday, Sept. 19, 2012. The recently-opened exhibit of the artist's large-scale light sculptures features computer-driven, non-repeating light patterns emitted from wall and ceiling-mounted installations. (AP Photo/ Wisconsin State Journal, John Hart)
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