(a) Not more than four lamps of the following types showing to the front of a vehicle may be lighted at any one time:
- (1) Headlamps.
- (2) Auxiliary driving or passing lamps.
- (3) Fog lamps.
- (4) Warning lamps.
- (5) Spot lamps.
- (6) Gaseous discharge lamps specified in Section 25258.
- (b) For the purpose of this section each pair of a dual headlamp system shall be considered as one lamp.
- (c) Subdivision (a) does not apply to any authorized emergency vehicle.