How Aurora Handles Outdoor Lighting: A Practical Guide
Aurora maintains 156 local ordinances across all categories, and 3 of those deal specifically with outdoor lighting. Here is a breakdown of what the city actually requires, what is prohibited, and where Aurora falls on the strict-to-permissive spectrum compared to other cities.
Billboard Lighting
Aurora's Unified Development Ordinance requires all sign illumination, including off-premises billboards, to be shielded against glare onto neighboring land, and bars lighting billboards next to residential property between 11 p.m. and 6 a.m.
Key details: Residential curfew: Off 11:00 p.m.–6:00 a.m.. Shielding standard: No glare onto ROW or neighbors. Where billboards allowed: I-2 district, within 1,000 ft of highway. Enforcing office: Planning Director / Neighborhood Services. Instrument current through: Ord. 2026-03, Feb. 23, 2026.
An unshielded or non-curfewed billboard light is a UDO violation. The City typically gives 10 days' written notice to correct it, then may summon the owner to municipal court, with penalties set under Aurora City Code § 1-13 and each day of continued violation counted separately.
Light Trespass & Shielding
Aurora's Unified Development Ordinance requires building-mounted lights to point downward, bars wall-pack fixtures unless their cutoff angle eliminates off-site glare, and caps light spillover onto neighboring lots at 0.1 footcandle measured ten feet from the property line.
Key details: Building light direction: Must be aimed downward. Wall packs: Banned unless glare-eliminating cutoff angle. Above-parapet mounting: Allowed only for security/decorative lights. Spillover cap: 0.1 footcandle, 10 ft from lot line. Governing instrument: UDO, current through Feb. 2026.
Non-compliant fixtures are caught at building-permit and site-plan review, where the city can condition approval on refitting or re-aiming the light; unpermitted or ongoing violations are enforceable through the UDO's general zoning code enforcement process.
Dark Sky Rules
Aurora's Unified Development Ordinance requires full cutoff shielded fixtures for on-site streets, parking areas, and most pedestrian paths, caps fixture height, bans mercury vapor and low-pressure sodium lighting, and limits how much light spills onto neighboring properties.
Key details: Streets/parking fixture height cap: 25 ft (40 ft in remote I-2). Walkway fixture height cap: 16 ft, full cutoff shielded. Off-site light spillover limit: 0.1 footcandle at 10 ft. Prohibited light sources: low-pressure sodium, mercury vapor. Minimum fixture efficiency: 80 lumens per watt.
Enforced through Aurora's development review and building permit process under the UDO; a site or lighting plan that doesn't meet § 146-4.9's shielding, height, and spillover limits is not approved, and code enforcement can require retrofits on noncompliant installed fixtures.
The Bottom Line
Aurora'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 Aurora is broadly strict or permissive.
Keep in mind that Aurora can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.