All residential zones and commercial uses adjoining residential zones shall not have a measured sustained light standard in excess of one-half foot-candle at the property line. Outdoor lighting fixtures shall be fully shielded so as to cause all emitted sustained light to be projected below an imaginary horizontal plane passing through the lowest point of the luminary, lamp or light source used in the fixture. The luminary, lamp, or light source shall not be directly visible from any adjoining residential property. The shielding requirement shall not apply to decorative landscape lighting fixtures of 50 watts or less, holiday lighting, fossil fuel lighting, or lighting within front yard areas intended to illuminate pedestrian and vehicular entries, landscaping/architectural accents, and the like. Skylights, greenhouses, and agricultural production activities are exempt. Public recreational facilities are not subject to the performance standards, but shall be reviewed through the use permit process for minimizing lighting impacts to surrounding properties, and may be subject to restrictions on operating hours and/or the number and type of lighting fixtures.