Creators haven’t been shy about their desire to make the large-scale light show permanent, but an initial push to raise funds for a 10-year reinstallation sputtered this summer. [...] there’s an evolving agreement that if “Bay Lights” boosters can raise the $4million necessary to reinstall an upgraded version, bridge crews will keep an eye on things from there on out. Staffers at that agency have been crafting a draft memorandum with Caltrans, which owns the 78-year-old western span, and the nonprofit that conceived “Bay Lights,” Illuminate the Arts. The programmed but seemingly random installation by artist Leo Villareal consists of 25,000 LED lights attached to 300 suspender cables on the side of the bridge that faces the Financial District and Telegraph Hill. Even as the agreement with transportation agencies evolves — the earliest vote on a full memorandum of understanding would be in November — “Bay Lights” has received attention of a different sort from a national design advocacy group. Most of the highlighted creations are under physical pressure rather than financial strains, such as the Wells Petroglyph Preserve in northern New Mexico, threatened by erosion, and the garden designed by British landscape architect Russell Page in 1973 at New York’s Frick Collection.