All parking areas and walkways thereto and appurtenant passageways and driveways serving commercial, public, office, multiple family or other uses having common off-street parking and/or loading areas shall be adequately illuminated for security and safety purposes. The lighting plan in and around the parking areas shall provide for non-glare lights focused downward. The light intensity provided at ground level shall be indicated in footcandles on the submitted site plans and shall average at least 0.5 footcandles at intersections and 0.3 footcandles elsewhere in the area to be illuminated. Lighting shall be provided by fixtures with a mounting height not more than 18 feet or the height of the building, whichever is less, measured from the ground level to the centerline of the light source.