New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 3-48

(a) Whenever there shall be in this article a requirement declared as to the distance from which certain lamps and devices shall render objects visible or within which such lamps or devices shall be visible, said provisions shall apply during the times when lighted lamps are required upon a straight level unlighted highway under normal atmospheric conditions unless a different time or condition is expressly stated.

(b) The light from every required exterior lamp on a vehicle shall be visible from a distance of 500 feet in the directions set forth therefor in paragraph (d) of this section except that the light illuminating a license plate shall cause the license plate to be clearly legible from a distance of 50 feet to the rear. Such visibility is not required when the light is obscured by another vehicle in a combination of vehicles.

(c) Every required Class A reflector shall be visible from all distances between 100 and 600 feet, and every required Class B reflector shall be visible from all distances between 100 and 350 feet, when illuminated by the upper beam of headlamps.

(d) Light from every headlamp, other driving lamp, clearance lamp, identification lamp and single-faced turn signal mounted on or at the front of a vehicle, and front parking light, shall be visible to the front; that from every side-marker lamp and side reflector shall be visible to the side; that from every stop lamp, tail lamp, clearance lamp, identification lamp, back-up lamp and reflector mounted on the rear, from every turn signal mounted on the rear of a vehicle or the cab of a truck tractor, and from any rear parking lamp, shall be visible to the rear; that from any double-faced turn signal shall be visible to the front and to the rear at the side on which such lamp is mounted; and that from any projecting load marker lamp or combination marker lamp shall be visible from the direction stated in the provision requiring it.