That twilight period before the sun is officially up takes around 20 minutes most mornings. Minneapolis-based artist Cameron Gainer's Sunrise/Sunset takes 18 minutes every time. His video installation plays out in a darkened room at Ambach and Rice Gallery, with pink and yellow light shining from a projector with an hourglass in front of its lens. This means, as the black sand slowly sinks, more light comes through. Sunrise/Sunset is in “Rocks & Clocks,” a show loosely about time, space and slowness, which includes L.A. artists Mungo Thomson, Emilie Halpern and Mark Hagen. 6148 Wilshire Blvd.; through June 1. (323) 965-5500, ambachandrice.com.

Tuesdays-Saturdays. Starts: April 6. Continues through June 1, 2013

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