The San Francisco-Oakland Bay Bridge is paving the way for the world's largest light sculpture. Designed by artist Leo Villareal, more than 25,000 white LED lights will be displayed across the bridge starting on March 5, and will be lit from dusk until midnight for two years.   The individually programmed lights will create stunning designs and patterns across its 1.8 mile span as part of a massive light show. The move is in part to celebrate the bridge's 75th anniversary. Installing the LED light system has been no easy task. Electricians started ...