California Code, Vehicle Code - VEH § 24411

Notwithstanding any other provision of law, a vehicle may be equipped with not more than eight lamps for use as headlamps while the vehicle is operated or driven off the highway.The lamps shall be mounted at a height of not less than 16 inches from the ground, or more than 12 inches above the top of the passenger compartment, at any place between the front of the vehicle and a line lying on a point 40 inches to the rear of the seat occupied by the driver, shall be wired independently of all other lighting circuits, and, whenever the vehicle is operated or driven upon a highway, shall be covered or hooded with an opaque hood or cover, and turned off.