R.I. Gen. Laws § 31-24-28: Maximum number of lamps lighted.

Whenever a motor vehicle equipped with head lamps as required by this chapter is also equipped with any auxiliary lamps or a spot lamp or any other lamp on the front of it projecting a beam of an intensity greater than three hundred (300) candle power, not more than a total of four (4) of the lamps on the front of a vehicle shall be lighted at any one time when upon a highway. Violations of this section are subject to fines enumerated in § 31-41.1-4.