BICYCLE LIGHTS LAW REQUIRMENTS IN Nevada
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.
NRS 484B.783 Lamps, reflectors and brakes required on bicycles, electric bicycles and electric scooters.
1. Every bicycle, electric bicycle or electric scooter when in use at night must be equipped with:
(a) A lamp on the front which emits a white light visible from a distance of at least 500 feet to the front;
(b) A red reflector on the rear of a type approved by the Department which must be visible from 50 feet to 300 feet to the rear when directly in front of lawful lower beams of headlamps on a motor vehicle; and
(c) Reflective material of a sufficient size and reflectivity to be visible from both sides of the bicycle for 600 feet when directly in front of the lawful lower beams of the headlamps of a motor vehicle, or in lieu of such material, a lighted lamp visible from both sides from a distance of at least 500 feet.
2. Every bicycle, electric bicycle or electric scooter must be equipped with a brake which will enable the operator to make the wheels skid on dry, level, clean pavement.