A.R.S. § 28-937: Lamps on other vehicles and equipment

All vehicles, including animal-drawn vehicles and vehicles that are referred to in section 28-921, subsection C and that are not specifically required by this article to be equipped with lamps, shall be equipped at the times specified in section 28-922 with at least one lighted lamp or lantern exhibiting a white light visible from a distance of five hundred feet to the front of the vehicle and with a lamp or lantern exhibiting a red light visible from a distance of five hundred feet to the rear.