Dark Sky Rules: Downey vs Los Angeles
How do dark sky rules rules compare between Downey, CA and Los Angeles, CA?
Downey has fewer restrictions than Los Angeles.
Downey, CA
Los Angeles County
Downey does not have a specific dark sky ordinance. As a fully urbanized LA County city, outdoor lighting is regulated through general nuisance provisions and building code standards for light spillage.
View full Downey rules →Los Angeles, CA
Los Angeles County
Los Angeles Municipal Code §93.0108 caps new outdoor LED fixtures at 3000K, requires full shielding, and limits trespass to 0.5 foot-candles at residential property lines. The ordinance applies citywide to new installations, replacements, and permitted remodels but exempts pre-existing fixtures and emergency lighting.
View full Los Angeles rules →Key Facts Comparison
| Fact | Downey | Los Angeles |
|---|---|---|
| Dark Sky Ordinance | None | - |
| Nuisance | Excessive light may be nuisance | - |
| Building Code | CALGreen lighting standards | - |
| New Construction | Title 24 efficiency required | - |
| - | - |
Highlighted rows indicate differences between cities.
Downey FAQ
What does fully shielded mean?
The fixture must direct all light downward with no light emitted above the horizontal plane. This prevents glare and sky glow while still providing ground illumination.
Can my neighbor's lights shine into my yard?
Most codes prohibit light trespass onto neighboring properties. Contact Downey code enforcement if outdoor lights from adjacent properties create a nuisance.
Los Angeles FAQ
Do I need to replace my existing lights?
No. Pre-existing fixtures are grandfathered. Replacements, new permits, and tenant improvements that touch the electrical system must comply with §93.0108.
Are holiday lights exempt?
Yes. Temporary seasonal lighting is exempt November 15 to January 15 if pointed downward.
What color temperature is allowed?
New outdoor LEDs are capped at 3000K. Warm-white 2700K is recommended for hillside and residential areas.
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