Okla. Stat. tit. 47, § 12-703
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.
Laws 2003, SB 633, c. 411, § 76, eff. November 1, 2003; Amended by Laws 2005, HB 1246, c. 50, § 18, eff. November 1, 2005 (superseded document available).