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Outdoor Lighting

San Diego's Outdoor Lighting: The Rules That Matter

By CityRuleLookup Editorial Team

Every city handles outdoor lighting a little differently. In San Diego, California, there are 2 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Light Trespass & Shielding

San Diego exempts security lighting for walkways, equipment yards, and parking lots from its 11 p.m. curfew, but only if adequate public-safety lighting is maintained and output is reduced after 11 p.m. where practicable.

Key details: Exempt use: security, walkways, equipment yards, lots. Condition: reduce output after 11pm if practicable. Still applies: shield/flat-lens rule §(c)(2). Observatory zone: 4,050 lumens / 2500K cap.

Development Services can cite a security-lighting installation that isn't reduced after 11 p.m. or that skips the required shielding as a zoning code violation, requiring retrofit.

Dark Sky Rules

San Diego caps most outdoor lighting at 4000 Kelvin color temperature and requires it off between 11 p.m. and 6 a.m., with a stricter 2500 Kelvin/4,050-lumen cap near the Palomar and Mount Laguna observatories.

Key details: CCT cap: 4000K citywide. Curfew: 11pm-6am, most fixtures. Observatory zone cap: 2500K / 4,050 lumens. Zone radius: 30 miles of Palomar, Mt. Laguna.

Enforced by the City's Development Services Department through the zoning and electrical permit process; a nonconforming fixture can be cited as a code violation and the owner ordered to retrofit or shield it.

The Bottom Line

San Diego's outdoor lighting rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming San Diego is broadly strict or permissive.

All of the above reflects San Diego's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.