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Outdoor Lighting

Outdoor Lighting in Nashua, NH: What Residents Actually Need to Know

By CityRuleLookup Editorial Team

If you live in Nashua or are thinking about moving there, outdoor lighting are one of those things you probably won't think about until they affect you directly. Nashua has 2 specific rules on the books covering different aspects of outdoor lighting, and some of them might surprise you.

Light Trespass & Shielding

Nashua's zoning code caps light spilling onto neighboring property at 0.2 footcandles at any property line, with taller or brighter fixtures required to step back from boundaries and file a lighting plan for review.

Key details: Property-line limit: 0.2 footcandles maximum. Governing section: § 190-89, Land Use Code. Max mounting height: 25 feet, height formula applies. Exempt districts: D-1 and D-3 Downtown. Waiver authority: Planning Board under § 190-148.

Violating Nashua's lighting standards is punishable under the Code's general penalty, § 1-12: a fine up to $1,000, with each day of continued violation counted as a separate offense.

Dark Sky Rules

Nashua's Zoning Ordinance caps outdoor light spillover at 0.2 footcandles at any property line and requires most fixtures over 1,800 lumens to be shielded so no more than 3% of their output escapes above horizontal.

Key details: Property-line limit: 0.2 footcandles maximum. Shielding trigger: over 1,800 lumens (900 flood/spot). Shielding standard: ≤3% light above horizontal. Max mounting height: 25 feet, formula-capped. Exempt zones: D-1 and D-3 Downtown Districts.

Enforced by Nashua's Code Enforcement Department and Zoning Administrator as a Land Use Ordinance violation; nonconforming fixtures that are replaced or relocated must be brought into compliance with current shielding and height limits.

The Bottom Line

Nashua'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 Nashua is broadly strict or permissive.

This guide is based on Nashua's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.