Eagle Mountain, UT Outdoor Lighting: Dark Sky Rules (2026)

Chapter 17.56 of the Eagle Mountain Municipal Code sets citywide outdoor lighting standards meant to preserve the city's rural character next to the Camp Williams military training area and cut light pollution. Section 17.56.050(A) is the core shielding rule: all permanent light fixtures must be full cutoff fixtures with the light source fully shielded for all uses and directed downward, and this applies to single-family and multifamily residential uses, not just commercial sites. The chapter also encourages low pressure sodium lamps for their efficiency and spectral characteristics (17.56.050(B)), caps fixture height at 12 feet for freestanding residential luminaires (17.56.060(B)), and limits parking lot pole height to 17 feet, or 30 feet in industrial areas if full cutoff fixtures with motion sensors are used (17.56.060(A)).

Nonessential commercial exterior lighting must shut off by 11:00 p.m. or when the business closes, whichever is later (17.56.050(G)). Uplighting is prohibited citywide except for narrow exceptions such as government flagpoles capped at 1,300 lumens (17.56.070(B), 17.56.060(D)). New lighting installed after the ordinance's effective date must conform immediately; lighting installed before that date is grandfathered unless it is directly affected by a project needing a site plan or building permit, in which case it must be brought into conformance before a certificate of occupancy or final inspection issues (17.56.040(A), (B)).

Plans for any lighting tied to a permit, subdivision, or development application must be submitted to the planning director showing fixture locations, types, wattages and lumen outputs (17.56.100).