2 county-level rules, plus city-specific rules for 1 city in Jefferson County, Colorado.
Verified from official government sources
Jeffco Section 12 requires exterior lights to be full cut-off fixtures above set brightness thresholds - all lamps in mountain areas, and lamps over roughly 1,750 lumens (residential) or 2,800 lumens (plains). Pole heights are capped at 14 feet in the mountains and 20 feet in the plains.
Jefferson County Zoning Resolution Section 12.E.3
Pole heights in mountain areas shall not be greater than 14 feet. In the plains, a pole-mounted luminaire shall not be greater than 20 feet in height.
Jeffco Section 12 requires that luminaires and their supporting structure be wholly confined to the property, and it caps light measured at the property line. Residential/agricultural uses adjacent to similar uses may not exceed 0.2 foot-candles in the mountains or 0.3 in the plains at the property line.
Jefferson County Zoning Resolution Section 12.E.2
Luminaires and their supporting structure shall be wholly confined to the property.
1 cities in Jefferson County have their own outdoor lighting rules. Each link goes to that city's dedicated page with code citations.
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