17.120.040 General requirements.
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All lighting fixtures shall be directed downward with mechanisms to prevent dark sky illumination, pursuant to the guidelines of the International Dark-Sky Association.
A. Shielding. All exterior illumination devices, except those that are exempt from this chapter, shall be fully shielded and downward directed.
1. “Fully shielded” shall mean that those fixtures shall be shielded in such a manner that light rays emitted by the fixture, either directly from the lamp or indirectly from the fixture, are projected below a horizontal plane running through the lowest point on the fixture where light is emitted. [Ord. 08-17-2021B § 2 (Exh. A)].