No openings shall be permitted in or on any sidewalks in the city for transmission of light to basements or floors below, with floor light not over four inches square, not less than three-quarters of an inch thick, set in metal frames. No railings shall be permitted about any lights in the sidewalks to basements or floors below, nor shall any openings be allowed or permitted for the purpose or transmitting light to basements or floors below.
(1992 Code, § 7-1-417)