§ 151.168  OUTDOOR LIGHTING.
   (A)   Applicability.
      (1)   General.  Unless otherwise expressly stated, the provisions of this section shall apply to all outdoor lighting except lights on lots containing single family detached houses, public street lights, and the exempt active outdoor recreational uses specified in the following subsection (A)(2).
      (2)   Exempt active outdoor recreational uses. Because of their unique requirements for nighttime visibility and their limited hours of operation, active outdoor recreational facilities within a public park and schools shall be exempt from the outdoor lighting standards of this section. Exempt active outdoor recreational uses shall be subject to the following requirements in addition to the general standards applicable to all outdoor lighting contained in subsection (A)(3) below:
         (a)   Exempt outdoor recreational uses shall not exceed a maximum permitted post height of 50 feet;
         (b)   Light sources or luminaires shall not be located within landscape areas except on pedestrian walkways; and
         (c)   Lights shall not be illuminated after 11:00 p.m.
      (3)   General standards applicable to all outdoor lighting.  Outdoor lighting shall comply with the following standards:
         (a)   Outdoor lighting shall not exceed one-half footcandle at any point on the adjoining property if the subject property abuts a residential zoning district or a lot containing a residential use;
         (b)   Outdoor lighting shall not exceed one footcandle at any point on the adjoining property if the subject property abuts a nonresidential zoning district or lot containing a nonresidential use or at the right-of-way line;
         (c)   All luminaires shall be shielded to prevent light and glare spillover to adjacent residential property and abutting rights-of-way;
         (d)   No flickering or flashing lights, search lights, laser source lights or mercury vapor lamps shall be permitted; and
         (e)   Subject to the above standards, security lighting shall be installed on the site of nonresidential development in accordance with industry standards for security lighting.
   (B)   Measurements.
      (1)   Metering equipment.  Lighting levels shall be measured in footcandles with a direct-reading, portable light meter. The meter shall read within an accuracy of plus or minus 5%. It shall have been tested, calibrated, and certified by an independent commercial photometric laboratory or the manufacturer within one year of the date of its use.
      (2)   Method of measurement.  The meter sensor shall be mounted not more than six inches above ground level in a horizontal position at the property line. Readings shall be taken only after the cell has been exposed long enough to provide a constant reading. Measurements shall be made after dark with the light sources in question on, then with the same sources off. The difference between the two readings shall be compared to the maximum permitted illumination. This procedure eliminates the effects of moonlight and other ambient light.
(Ord., § 9.4, passed 10-13-2009; Ord. 19-1378, passed 9-10-2019)