Dark Sky Rules: Pittsburg vs Walnut Creek

Pittsburg regulates outdoor lighting under Municipal Code Title 18 zoning standards to minimize light pollution and glare. Exterior fixtures must be shielded and directed downward in most zones. Full cutoff fixtures are required for commercial and parking lot lighting. No formal dark-sky ordinance exists, but light trespass onto neighboring properties is prohibited.

Walnut Creek regulates outdoor lighting through its zoning code to minimize light pollution and glare on neighboring properties. While not a formal Dark Sky community, the city requires shielded fixtures for commercial properties and limits lighting intensity and hours.