Hartford, CT Outdoor Lighting: Light Trespass & Shielding (2026)

Hartford Zoning Regulations § 6.15.2, the Design Standards section of Article 6.15 (Site Lighting), sets the city's numeric light-trespass ceiling. Subsection B(1) states the maximum light level at any point on a property line "shall not exceed: 0.1 footcandles within or adjacent to a residential property or a property in the N or NX districts, or 0.2 footcandles in other properties." The zoning administrator or commission can exempt a specific fixture from that cap under B(2) only if it finds the fixture does not adversely affect an adjacent owner or is necessary for the use to function.

The section opens with a general directional rule, § 6.15.2.A: "all exterior light sources shall be directed downward and the illumination confined to necessary or useful areas." That downward-aim rule is reinforced by § 6.15.2.F on unshielded fixtures. Ordinary unshielded lighting is prohibited outright under F(2) unless the applicant can show the fixture's light-distribution pattern isn't objectionable. The only carved-out unshielded fixture is motion-activated lighting between 2,000 and 6,000 lumens (F(1)), and even that must be "aimed and located in such a manner as to prevent glare and light trespass," switch off automatically within 5 minutes of the triggering motion, and never be tripped by activity happening off the lit property.

These design standards apply to any new outdoor fixture and to any "replacement" of an existing one, defined in § 6.15.1.B as a change in fixture type, mounting height or location; simply swapping a bulb or ballast without raising lumen output doesn't trigger compliance. The stated intent behind the whole article, § 6.15.1.A, is to "reduce light pollution, light trespass, glare and offensive light sources" while preserving a dark enough sky to see the Milky Way. Non-residential lots with four or more parking-lot poles must also cut lighting by half within 30 minutes of closing under § 6.15.2.G.