Dark Sky Rules: Richmond vs San Ramon

Richmond regulates outdoor lighting through zoning provisions requiring shielded fixtures, limits on light trespass, and consideration of wildlife impacts near shoreline habitats, though not a formal IDA dark-sky community.

San Ramon regulates outdoor lighting through its Development Code (Title D) to reduce light pollution, glare, and spillover onto adjacent properties. Requirements include shielded fixtures, downward-directed light, and limits on lumens and color temperature (typically 3000K or below preferred). The city is not a formal IDA Dark Sky community but incorporates dark-sky principles in design review for new development, especially near open space preserves (Bishop Ranch Regional Preserve, Las Trampas).