The Bay Lights installation is dancing out of sync, and organizers are racing to solve the problem.
Several hundred of the 25,000 LED lights illuminating the Bay Bridge's 1.8-mile western span are stuck in the on or off position right now, disrupting the $8 million light display that is attracting visitors to The City's waterfront.
"The lights are not behaving exactly as they should," spokesman Ben Davis said. "We need to figure out why."
Davis said the bridge presents several challenges for the "audacious" public art show created by New Yorker Leo Villareal. He said wind, rain, salty air and vibrations caused by traffic are among the variables that could be responsible for the malfunction.
"We don't know if any of that is responsible. There are many things we're looking at," Davis said. "It's a unique environment."
At this point, it's unclear whether the show will need to be temporarily halted and there is no fixed timetable for resolving the problem.
"I would expect that we'll be able to mount some sort of plans within the week," Davis said.
Right now, the privately funded show is roughly $1.5 million short of the $8 million required to keep it running through March 2015, and Davis said maintenance could increase costs.
"It seems possible that we could have to re-address the maintenance budget," he said.