Okla. Stat. tit. 47, § 47-12-703: Rear lamp

Every bicycle in use at the times described in subsection B of

Section 12-201 of this title shall be equipped with a lamp on the

rear emitting a red light visible from a distance of at least one

thousand (1,000) feet to the rear. This section shall not apply to

a street or highway with a speed limit of twenty-five (25) miles per

hour or less.