R.I. Gen. Laws § 31-24-35: Lamps on animal-drawn, farm, and road vehicles.

All vehicles, including animal-drawn vehicles and including those referred to in § 31-23-3 not specifically required by this chapter to be equipped with lamps, shall at the times specified in § 31-24-1 be equipped with at least one lighted lamp or lantern exhibiting a white light visible from a distance of five hundred feet (500′) to the front of the vehicle and with a lamp or lantern exhibiting a red light visible from a distance of five hundred feet (500′) to the rear. Violations of this section are subject to fines enumerated in § 31-41.1-4.