Minnesota Statutes Transportation (Ch. 160-174A) § 169.63. Number of lamps

(a) At all times when lighted lamps on vehicles are required in this chapter, at least two lighted headlamps shall be displayed, one on each side at the front of every motor vehicle, other than a motorcycle; provided, that under adverse weather conditions two lighted auxiliary lamps, one on each side at the front of the vehicle, may be used in lieu of two lighted headlamps, except when such vehicle is parked subject to the rules governing lights on parked vehicles.

(b) When a motor vehicle equipped with headlamps, as herein required, is also equipped with any auxiliary lamps, spot lamps or any other lamps on the front thereof projecting a beam of intensity greater than 300-candle power, not more than a total of four of any such lamps on the front of a vehicle shall be lighted at any one time when upon a highway.

(c) The maximum beam candle power from any combination of lamps used at any time for road lighting shall not exceed that authorized by the commissioner of public safety.