(Excerpt from 'San Francisco's Bay Bridge Becomes Public Art' posted by Jane J. Lee on National Geographic on Mar. 8, 2013. Found here http://news.nationalgeographic.com/news/2013/03/130308-bay-bridge-led-light-art-culture)
San Francisco Bay Bridge is turned into magnificent art installation using thousands of LEDS controlled by a single laptop computer.
For the next two years, San Francisco's Bay Bridge will have quite the nightlife. Officials threw the switch March 5 on a new public art installation, turning on 25,000 light-emitting diodes (LEDs) affixed to the suspension cables on the western span.
This public art installation will shine from dusk until 2 a.m. each evening with patterns of light that never repeat, thanks to a computer program created by artist Leo Villareal.
This program, based on software used by graphic artists to simulate rain or snow for movies and games, allows Villareal to flick points of light on and off according to a specific set of rules that he determines.
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(Image: Photograph by Stephen Lam, Getty Images)