Section 811 - Definitions(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.Cal. Code Regs. Tit. 13, § 811
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.
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).