Ariz. Rev. Stat. § 28-960
A. Except as provided in subsection B of this section, a person shall not operate a motor truck, passenger bus or truck tractor on a highway outside the corporate limits of a city or town from a half hour after sunset to a half hour before sunrise unless the following equipment is carried in the vehicle:
1. At least three flares or three red electric lanterns that comply with the following:
2. At least three red-burning fusees, unless red electric lanterns are carried, that are: