California Code of Regulations › Title 13 - Motor Vehicles › Division 2 - Department of the California Highway Patrol › Chapter 2 - Lighting Equipment › Article 22 - Warning Lamps › Section 811 - Definitions

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Warning Lamp --
				  A "warning lamp" is a lamp designed for use on authorized emergency vehicles
				  and prescribed types of special hazard vehicles to indicate the existence of a
				  traffic hazard or to signal other drivers to stop or yield the right of
				  way.
(b) Warning Lamp Assembly -- A
				  "warning lamp assembly" is a device that consists of a housing with one or more
				  light sources and any lenses, reflectors and any other components or devices
				  necessary to provide the required level of performance.
(c) Warning Lamp Housing -- A "warning lamp
				  housing" is a device that holds a warning lamp unit or the light source(s),
				  lens(es), reflector(s) and other components of a warning lamp
				  assembly.
(d) Warning Lamp Unit --
				  A "warning lamp unit" is a sealed or semisealed optical unit designed to meet
				  the dimensional specifications of SAE J571d, June 1976, SAE J572a, January
				  1972, or SAE J760a, December 1974, and which meets the color and photometric
				  requirements.
(e) Flashing Lamp --
				  A "flashing lamp" is a lamp in which the emitted light in a particular
				  direction alternates between on and off either electrically by controlling the
				  current or mechanically by a revolving, oscillating, or other mechanism, or by
				  other means such that the light output in a given direction is discernibly and
				  regularly interrupted or intermittent at the required periodic rate.
(f) Steady-burning Lamp -- A "steady burning
				  lamp" is a lamp in which the emitted light in any direction is
				  uninterrupted.
(g) Light Source --
				  A "light source" is an individual incandescent bulb, light emitting diode, are
				  discharge bulb or other device that produces visible light whenever appropriate
				  electrical energy is supplied to it.
(h) Light Pulse -- A single, visually
				  continuous emission of optical energy. High frequency modulation is permitted
				  (reprinted with permission from SAE J595 [January 2005] © 2005 SAE
				  International).
(i) Flash -- A
				  flash is a light pulse, or a train of light pulses, where a dark interval of at
				  least 160ms separates the light pulse or the last pulse of the train of light
				  pulses from the next pulse or the first pulse of the next train of light
				  pulses. To be considered a train of light pulses, each pulse in the train must
				  begin within 100ms after the end of the preceding light pulse. Dark interval
				  luminous intensity shall not exceed two percent of the maximum luminous
				  intensity of a flash (reprinted with permission from SAE J595 [January 2005]
				  © 2005 SAE International).
(j)
				  On-time -- Summation of the light pulse(s) within a flash.
1. Amendment
					 filed 11-25-2002; operative 12-25-2002 (Register 2002, No. 48).
2.
					 New subsections (h)-(j) filed 10-17-2007; operative 11-16-2007 (Register 2007,
					 No. 42).
Note: Authority cited: Section
						26103,
						Vehicle Code. Reference: Section
						26103,
						Vehicle Code.