Mich. Comp. Laws § 257.703: Slow-moving vehicles; reduced lighting power.

Sec. 703.

Any motor vehicle may be operated under the conditions specified in section 684 when equipped with 2 lighted lamps upon the front thereof capable of revealing persons and objects 75 feet ahead in lieu of lamps required in section 699 or section 701: Provided, however, That at no time shall it be operated at a speed in excess of 20 miles per hour.