ARS STATE STATUTES

28-941. Multiple beam road lighting equipment arrangement
Except as otherwise provided in this article, the head lamps, the auxiliary driving lamp or the auxiliary passing lamp or combinations of the head lamps, driving lamp or passing lamp on a motor vehicle other than a motor driven cycle shall be arranged so that selection may be made between distributions of light projected to different elevations, subject to the following requirements and limitations:
1. There shall be an uppermost distribution of light, or composite beam, so aimed and of sufficient intensity to reveal persons and vehicles at a distance of at least three hundred fifty feet ahead for all conditions of loading.
2. There shall be a lowermost distribution of light, or composite beam, so aimed and of sufficient intensity to reveal persons and vehicles at a distance of at least one hundred feet ahead, and under any condition of loading, none of the high intensity portion of the beam shall be directed to strike the eyes of an approaching driver.
3. A new motor vehicle, other than a motor driven cycle, that is registered in this state and that has multiple beam road lighting equipment shall be equipped with a beam indicator that is:
(a) Lighted when the uppermost distribution of light from the head lamps is in use and not otherwise lighted.
(b) Designed and located so that when lighted it is readily visible without glare to the driver of the vehicle.
4. A person shall not operate a motor vehicle with a colored transparent or translucent substance or material installed, affixed or applied on or in front of the head lamps, the auxiliary driving lamp or the auxiliary passing lamp or combinations of the head lamps, driving lamp or passing lamp that would obstruct, reduce or interfere with the visibility or effectiveness of the head lamps or that would change the color of light emitted. This paragraph does not prohibit the placement of clear transparent material mounted in front of the head lamps, fog lamps or auxiliary driving lamps.

28-944. Lighting equipment on motor driven cycles
The head lamp or head lamps on a motor driven cycle may be of the single beam or multiple beam type and shall comply with requirements and limitations as follows:
1. A head lamp or head lamps on a motor driven cycle shall be of sufficient intensity to reveal a person or a vehicle at a distance of not less than one hundred feet when the motor driven cycle is operated at a speed of less than twenty-five miles per hour and at a distance of not less than two hundred feet when the motor driven cycle is operated at a speed of twenty-five or more miles per hour, and the motor driven cycle is subject to the speed limitations in section 28-705.
2. If the motor driven cycle is equipped with a multiple beam head lamp or head lamps:
(a) The upper beam shall meet the minimum requirements provided in paragraph 1 of this section and shall not exceed the limitations set forth in section 28-941, paragraph 1.
(b) The lowermost beam shall meet the requirements applicable to a lowermost distribution of light as set forth in section 28-941, paragraph 2.
3. If the motor driven cycle is equipped with a single beam lamp or lamps, the lamp or lamps shall be aimed so that when the vehicle is loaded none of the high intensity portion of light, at a distance of twenty-five feet ahead, projects higher than the level of the center of the lamp from which it comes.

28-947. Special restrictions on lamps
A. A person shall direct a lighted lamp or illuminating device on a motor vehicle, other than a head lamp, spot lamp, auxiliary lamp or flashing front direction signal, that projects a beam of light of an intensity greater than three hundred candlepower so that no part of the beam strikes the level of the roadway on which the vehicle stands at a distance of more than seventy-five feet from the vehicle.
B. A person shall not drive or move a vehicle or equipment on a highway with a lamp or device on the vehicle that is capable of displaying a red or red and blue light or lens visible from directly in front of the center of the vehicle. Lights visible from the front of a vehicle shall be amber or white. This section does not apply to either of the following:
1. An authorized emergency vehicle or a vehicle on which a red or red and blue light or lens visible from the front is expressly authorized or required by this chapter.
2. A fire engine that is solely used for hobby or display purposes and that has been issued a historic vehicle license plate pursuant to section 28-2484 if either of the following applies:
(a) The lights are covered and are not activated while a person is transporting or driving the vehicle to or from a parade, authorized assemblage of historic vehicles or test.
(b) The lights are activated only in a parade, for an authorized assemblage of historic vehicles or for testing purposes.
C. Except as provided in subsection D or E of this section, flashing lights on motor vehicles are prohibited except either:
1. On authorized emergency vehicles, school buses or snow removal equipment.
2. As warning lights on disabled or parked vehicles.
3. On a vehicle as a means for indicating a right or left turn.
D. A vehicle may have lamps that may be used to warn the operators of other vehicles of the presence of a vehicular traffic hazard requiring the exercise of unusual care in approaching, overtaking or passing. The vehicle may display these lamps as a warning in addition to any other warning signals required by this article. The lamps used to display the warning to the front shall be mounted at the same level and as widely spaced laterally as practicable and shall display simultaneously flashing white or amber lights or any shade of color between white and amber. The lamps used to display the warning to the rear shall be mounted at the same level and as widely spaced laterally as practicable and shall show simultaneously flashing amber or red lights or any shade of color between amber and red. These warning lights shall be visible from a distance of at least one thousand five hundred feet under normal atmospheric conditions at night.
E. A person may equip a motorcycle with a means of modulating the intensity of a head lamp beam between the higher and lower brightness at a rate of two hundred to two hundred eighty cycles per minute. A person shall not modulate the head lamp beam during the hours of darkness as prescribed in section 28-922.