The bay lights arrive like a slow switch being turned on: low, steady glows from maritime cranes, brighter beacons from the Embarcadero, and the downtown skyline cutting a jagged silhouette against the night. You step aboard a low-profile electric boat at America's Cup Harbor, the deck humming quietly as 360-degree LEDs begin to color the water around you. Music from the onboard stereo sets a tempo; the boat responds with near-silent propulsion and the crew points the bow toward downtown, where reflections pull you forward.