All paved areas shall be illuminated with a minimum level of illumination not less than two horizontal foot candles (lumens per foot) throughout. All other areas shall have a minimum level of illumination not less than 0.5 horizontal foot candles (lumens per foot). Such level of illumination shall be maintained from one hour before sunset to one hour after sunrise. Electrical power shall be supplied by one or more outlets furnishing a total of at least 1,200 watts of power for every 4,000 square feet, or fraction thereof, of the area of the open space.