N.J. Stat. Ann. § 39:3-49

Except as hereinafter in this article provided, every motor vehicle other than a motor-drawn vehicle and other than a motor cycle shall be equipped with at least 2 approved headlamps mounted at the same level with an equal number on each side of the front of the vehicle. Every motor cycle shall be equipped with at least 1 and not more than 2 approved headlamps. Every motor cycle equipped with a side car or other attachment shall be equipped with a lamp on the outside limit of such attachment capable of displaying a white light to the front.