The Bay Bridge has sparkled for 10 years with a light installation designed by artist Leo Villareal. But the display costs millions to maintain and, with funds drying up, could soon go dark forever. Columnist and TotalSF podcast co-host Heather Knight and urban design critic John King join host Cecilia Lei to argue the cases for — and against — a fund-raising campaign to preserve the Bay Lights. | Unlimited Chronicle access: sfchronicle.com/pod

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