V C Section 25351 Identification Lamps
25351. (a) A commercial vehicle and, except as provided in subdivision (d), any other vehicle 80 or more inches in width may be equipped with identification lamps mounted on the front or rear. No part of any such lamps or their mountings on the front of a motor vehicle shall extend below the top of the windshield.
(b) Identification lamps on such vehicles manufactured prior to January 1, 1968, may exhibit either amber, green, or white light to the front and red light to the rear.
(c) Identification lamps on such vehicles manufactured on or after January 1, 1968, may exhibit only amber light to the front and red light to the rear.
(d) Identification lamps are not permitted on passenger vehicles, except housecars and ambulances, regardless of width.