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Trenton, NJ Outdoor Lighting: Dark Sky Rules (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Max footcandle at lot line
1.0 footcandle
Luminaire design
Full or semi-cutoff required
Nonresidential pole height cap
20 feet
Residential pole height cap
15 feet
Motion security light shutoff
Within 15 minutes
Sports field light curfew
1 hour after event ends

Summary

Trenton limits outdoor lighting to one footcandle at any lot line and requires every luminaire to use full cutoff or semi-cutoff optics under City Code § 315-9.3. Freestanding fixtures over 18 inches for nonresidential uses must sit at least 5 feet from a residential lot line, and pole height is capped at 20 feet in nonresidential districts and 15 feet in residential districts.

The maximum allowable footcandle at any lot line is one footcandle. All luminaires must be either full cutoff or semi-cutoff luminaire design. Any freestanding luminaire for a nonresidential use over 18 inches in height must be located at least 5 feet from a residential district lot line. The maximum total height of a freestanding luminaire is 20 feet in a nonresidential district, and 15 feet in a residential district. All outdoor luminaires must be located and adequately shielded so that there is no glare onto adjacent lots or onto the public right-of-way.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4853025; v21 updated 2025-12-16; through 12-16-2025).

Full Breakdown

A, showing pole and fixture locations, luminaire specifications, mounting heights and, where the lot abuts a residential district, photometric footcandle plans at the lot lines. B set the numeric limits: one footcandle maximum at any lot line, full cutoff or semi-cutoff luminaire design citywide, a 5-foot setback from residential lot lines for tall nonresidential fixtures, and total pole heights of 20 feet in nonresidential districts and 15 feet in residential districts. Every outdoor luminaire must be shielded so no glare crosses onto adjacent lots or the public right-of-way.

Projects that file a lighting plan also face a color-temperature cap: public lighting sources must sit at or below 3200 Kelvin correlated color temperature, except on outdoor recreation fields, and fixtures must carry an ENERGY STAR, Design Lights Consortium, Consortium for Energy Efficiency or FTC Lighting Facts efficiency certification. C(3) is still allowed. Security lighting on a motion vacancy sensor must extinguish within 15 minutes after the area clears. Outdoor recreational fields get a separate track: luminaires up to 65 feet without a conditional use approval, light aimed onto the field, and field lighting must go dark one hour after an event ends, though parking-area lighting on the same site is not on that clock.

Violations & Fines

Trenton enforces exterior lighting through zoning and site plan review; noncompliant fixtures can block site plan or zoning permit approval. Where Chapter 315 sets no specific penalty, the citywide general penalty in § 1-17 controls: a fine up to $2,000, up to 90 days in the county jail, or up to 90 days of community service, and § 1-18 makes each day a violation persists a separate offense.

Frequently Asked Questions

Does Trenton require dark-sky-friendly outdoor lighting?
Yes. City Code § 315-9.3.B requires every outdoor luminaire to be full cutoff or semi-cutoff in design and caps illumination at one footcandle at any lot line, so light must be shielded downward rather than spilling onto neighboring properties or the sky. Freestanding fixtures also carry height limits of 20 feet in nonresidential districts and 15 feet in residential districts.
Is a lighting plan required for a house in Trenton?
No. Section 315-9.3.A only requires a lighting plan for nonresidential, mixed-use and multi-family development. Single-family and two-family residential projects are exempt from the plan itself but still must meet the footcandle, cutoff-design and shielding standards in § 315-9.3.B.
What outdoor lighting is banned outright in Trenton?
Section 315-9.3.D prohibits flickering or flashing lights, searchlights and laser-source lights, and neon or LED strips used to outline doors, windows, architectural features or building facades. Shielded uplighting of a facade or sign aimed so glare stays off neighboring lots remains allowed under the exceptions in § 315-9.3.C(3).

Sources & Official References

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