§ 116.037  LIGHTING.
   (A)   All enclosed portions of the dwelling unit customarily occupied by human beings shall be provided with natural light by means of exterior glazed openings with an area not less than 1/8 of the total floor area, or shall be provided with artificial light. Such openings shall open directly onto a public way or a yard or court.
   (B)   Public hallways, corridors, stairways and other exit facilities shall be adequately lighted.