Driving north on Interstate 5 approx. 10miles south of the Los Banos exit at 11p. 3 large bright white lights, inline about 200' apart crossed the fwy heading west 500ft in front of me approx 100' in elevation. I tried to exit at Stearns Ave but was traveling 80+ mph in the fast lane and missed the exit. There was a motorbome parked at the exit. Many motorists on the fwy either stopped or pulled over behind me. I could not see the lights in my review mirror but 1 min later they were hovering over the fields on the west side of I5. There has to be many witnesses. Fwy traffic almost stopped behind me.