Idaho Code § 49-723
Every bicycle in use at the times described in section 49-903 , Idaho Code, shall be operated with a light emitting device visible from a distance of at least five hundred (500) feet to the front, attached to the bicycle or the rider, and with a reflector clearly visible from the rear of the bicycle.
[49-723, added 1988, ch. 265, sec. 212, p. 681.]