El Cajon, CA Outdoor Lighting: Billboard Lighting (2026)
Key Facts
- Frosted lamp cap
- 15 watts per lamp
- Or candlepower cap
- 0.5 candlepower at 10 feet
- Exterior light rule
- Must illuminate only the sign
- Applies to
- All permitted signs, incl. billboards
- Governing section
- § 17.190.100
Summary
El Cajon's citywide sign illumination standard, Municipal Code Section 17.190.100, caps frosted incandescent sign lamps at 15 watts, or 0.5 candlepower measured from ten feet away, and requires exterior lighting to shine only on the sign face, not onto neighboring property. The rule applies to every permitted sign in the chapter, including off-premises billboards approved under the sign overlay zone.
Permitted signs may be illuminated as follows: A. By interior means; B. By exterior means, provided such light illuminates only the sign and does not shine directly upon other property, either public or private; C. By frosted incandescent lamps, provided no single lamp exceeds fifteen watts capacity or does not exceed 0.5 candlepower at ten feet distance from sign.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4940073; v10 updated 2026-06-09).
Full Breakdown
270. 100 supplies the operative illumination limit for those structures as well as for on-premises wall, monument, pole, and roof signs. Exterior floodlighting aimed at a billboard face has to stay confined to the sign itself and cannot spill onto adjoining land, whether that neighboring land is publicly or privately owned. 270's grandfathering provision for existing off-premises structures, must still meet this illumination standard even where it is exempt from current spacing, height, or setback requirements. 070.
Violations & Fines
Exterior lighting that spills onto an adjacent property, or a frosted incandescent lamp exceeding 15 watts or 0.5 candlepower at ten feet, violates Section 17.190.100 regardless of whether the sign itself is otherwise conforming. Because illumination is part of the sign permit review under Section 17.190.060, unauthorized lighting changes can trigger the same nonconforming-sign abatement procedure in Section 17.190.280 and Chapter 17.120 that applies to oversized or unpermitted sign structures.
Frequently Asked Questions
Is there a specific lighting rule just for billboards in El Cajon?
How bright can a lit sign face be at night?
Can exterior floodlights aimed at a sign spill onto my neighbor's yard?
Sources & Official References
Other rules in El Cajon
California rules heatmap·Compare El Cajon to another location·View the California outdoor lighting overview
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