There will be permanent, artistic lights at the end of the tunnel — the westbound tunnel of the Bay Bridge leading into San Francisco, that is — come 2016.

After a two-month campaign, the nonprofit Illuminate the Arts announced Wednesday that it had raised the needed $4 million to reinstall the “Bay Lights” as a permanent fixture on the western end of the bridge.

Billed as the world’s largest light sculpture, the display of 25,000 LED lights turns the 1.8-mile San Francisco portion of the span into a nightly show of constantly changing abstract images.