Lehi, UT Outdoor Lighting: Light Trespass & Shielding (2026)
Key Facts
- Max intensity at residential line
- 0.2 foot-candles
- Residential pole/fixture max height
- 20 feet
- Shielding required above
- 10 feet
- Photometric design
- Required at development approval
- Direct shine on neighbor's dwelling
- Not permitted
Summary
Lehi defines light trespass as light falling where it is not wanted or needed and caps it at 0.2 foot-candles measured at a residential property line. Residential fixtures over ten feet must be shielded from neighboring property, and no light may shine directly onto an adjacent dwelling.
5. Light trespass. ... When light falls where it is not wanted or needed... 2. ... Direction. Direct lighting downward and inward, towards the interior of the site, to minimize sky glow, glare, and light trespass. The allowable maximum intensity measured at a residential property line shall be 0.2 foot-candles... 7. ... Residential lighting and glare standards. Residential lighting for security and night recreation use is permitted in all Residential Zoning Districts provided: ... (a) Direct lighting over ten feet in height is shielded from adjacent property; (b) No light pole or other stand-alone light source on private residential property shall exceed 20 feet in height; and (c) Lighting shall not directly shine on adjacent dwellings.
Full Breakdown
5 defines light trespass simply as light falling where it is not wanted or needed, one of several terms the Code uses to describe unwanted spillover from outdoor fixtures. 2 foot-candles, a level the Code defines as illuminance on a one-square-foot surface from a uniform light source. 7 adds residential-specific glare protection: lighting for security and night recreation is permitted in every residential zoning district, but direct lighting mounted over ten feet high must be shielded from adjacent property, no light pole or stand-alone light source on private residential property may exceed 20 feet in height, and lighting cannot directly shine on adjacent dwellings under any circumstance. 2 foot-candle ceiling is checked before a project is ever approved rather than only after a neighbor complains.
Violations & Fines
Outdoor lighting that exceeds 0.2 foot-candles at a residential property line, that is not shielded above ten feet on residential property, or that shines directly onto an adjacent dwelling is a Development Code violation under Section 34.010.D, a class C misdemeanor with each ten-day period of continued noncompliance a separate offense. The Zoning Administrator can require a photometric recheck or fixture modification as a condition of an existing approval.
Frequently Asked Questions
How bright can my neighbor's outdoor light be at my property line in Lehi?
Is there a height limit on residential light poles in Lehi?
Does a developer have to prove their lighting will not spill onto neighbors?
Sources & Official References
Other rules in Lehi
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Light Trespass & Shielding in Nearby Cities
How other cities in Utah County handle light trespass & shielding.