Montana Title 61. Motor Vehicles § 61-8-607. Lamps and other equipment on bicycles and mopeds

(a) a lamp on the front emitting a white light visible from a distance of at least 500 feet to the front. In lieu of a lamp affixed to the bicycle or moped, a bicyclist may use a lamp with equal intensity and visibility affixed to the cyclist's helmet and facing forward.

(b) facing the rear, either a lamp emitting a red light visible from a distance of at least 500 feet to the rear or a red reflector visible from a distance of at least 500 feet to the rear when illuminated by low-beam motor vehicle headlamps; and

(c) reflective material large and reflective enough to be visible from the left and right sides from a distance of at least 500 feet when illuminated by low-beam motor vehicle headlamps.