BICYCLE LIGHTS LAW REQUIRMENTS IN New Mexico
In US the bike lights die required by Law if you reading in low light conditions, The light can be attached to either the bike or to the cyclist but must be visible at least 500 feet to the front of the bicyde, so be careful how you position the light. Additional lighting must be consistent with the law specifying required lights and reflectors, so a rear light must be red.
66-3-707. Lamps and other equipment on bicycles.
A. Every bicycle when in use at nighttime shall be equipped with a lamp on the front which shall emit a white light visible from a distance of at least five hundred feet to the front and with a red reflector on the rear of a type approved by the division which shall be visible from all distances from fifty feet to three hundred feet to the rear when directly in front of lawful upper beams of head lamps on a motor vehicle. A lamp emitting a red light visible from a distance of five hundred feet to the rear may be used in addition to the red reflector.
B. No person shall operate a bicycle unless it is equipped with a bell or other device capable of giving a signal person use upon a bicycle any siren or whistle.
C. Every bicycle shall be equipped with a brake which will enable the operator to make the brake wheels skid on dry, level, clean pavement.