2 county-level rules, plus city-specific rules for 1 city in Sumner County, Tennessee.
Verified from official government sources
Tennessee has no dark-sky statute, but Sumner County's Zoning Resolution (Section 1107) limits glare to 0.5 foot-candles at a residential district boundary or street right-of-way and requires site lighting to be shielded. Gallatin, Hendersonville, and Portland add city standards.
Sumner County Zoning Resolution § 1107(7)
In all districts, any operation or activity producing glare shall be conducted so that direct and indirect light from the source shall not cause illumination in excess of 0.5 foot candles when measured at a residential district boundary or at the street right-of-way line.
Sumner County's Zoning Resolution requires all site lighting to be shielded so directly emitted light stays within the property line, and caps glare at 0.5 foot-candles at a residential boundary. Single-family neighbors rely on city rules or a nuisance claim.
Sumner County Zoning Resolution § 1107(7)
All site lighting shall be shielded so that substantially all directly emitted light falls within the property line of the lot emitting the light. No illumination shall produce direct, incident or reflected light that interferes with the safe operation of motor vehicles on public streets.
1 cities in Sumner County have their own outdoor lighting rules. Each link goes to that city's dedicated page with code citations.
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