All Warning Lamps Displayed on Special Hazard Vehicles Shall Comply to all Requirements
California Code of Regulations:
Title XIII, Motor Vehicles Division 2, Department of the California Highway Patrol Chapter 2, Lighting Equipment
Article 22, Warning Lamps. Permitted Yellow Warning Lamps on Special Hazard Vehicles: The flashing yellow warning lamps permitted on special
hazard vehicles shall be a Class B, C or E warning lamp, depending on whether the lamp is permitted to be displayed
only to the front and rear or to the front, sides, and rear.
Classification of Warning Lamps:
Class B: Moderate intensity, wide-beam lamp
Class C: High intensity, wide-beam lamp
Class E: Revolving, oscillating, or gaseous discharge lamp
General Requirements:
Flash Rate: Warning lamps shall operate at a rate of 60 to 120 flashes per minute.
Exterior Lens Surface: The outside surface of the illuminated section of the lens shall be smooth with no ribs, ridges,
or indentations other than marks of identification, screw holes, and sealed unit aiming pads.
Photometric Test Requirements:
The luminous intensity of warning lamps tested shall meet the requirements of the Minimum Candela
of the Table listed.
Required Laboratory Test:
Certification of Compliance to the Requirements of the Society of Automotive
Engineers, AMECA Accredited Laboratory