Lehi, UT Outdoor Lighting: Billboard Lighting (2026)
Key Facts
- Illumination cap
- 0.3 ft-candles above old sign (§23.190.D.2.d.ii)
- Dimming sensor
- Required (§23.190.D.2.d.iii)
- Photometric plan
- Due before install (§23.190.D.2.i)
- Post-install check
- Light reading required (§23.190.D.2.i)
- Residential curfew
- 11pm-6am within 400 ft (§23.190.D.2.j)
Summary
A converted digital billboard in Lehi can't push nighttime brightness more than 0.3 foot-candles over the sign it replaced, must carry an automatic sensor that dims the display as ambient light drops, and has to prove it with a photometric plan submitted before installation and a light reading afterward.
d. the EDS conversion adheres to the following illumination standards: (i) The off-premises or billboard EDS may use any method of illumination identified and allowed in this chapter. (ii) In no event shall an off-premises or billboard EDS increase the nighttime ambient illumination more than 0.3 foot candles when converting from an existing traditional non-electronic display face. The illumination measurements shall be calculated pursuant to Table 23.090.D of this chapter. ( ... iii) Off-premises and billboard EDSs shall be equipped with a sensor or other device that automatically determines the ambient illumination and which is programmed to automatically dim according to ambient light conditions to comply with the 0.3 foot candle requirement.
Full Breakdown
d sets the illumination standards a nonconforming billboard must meet to convert to an electronic display. C. 3 foot-candle ceiling as daylight fades. 3 foot-candle cap is being met. ; an exception applies only for an emergency public safety alert such as an AMBER Alert.
Violations & Fines
An EDS conversion that exceeds the 0.3 foot-candle ceiling, skips the required dimming sensor, or lacks the pre- and post-installation photometric readings is out of compliance with its conditional use permit and can have that approval reconsidered or revoked under Section 34.040; the underlying Development Code violation is also a class C misdemeanor under Section 34.010.D.
Frequently Asked Questions
How bright can a digital billboard be in Lehi at night?
Does a digital billboard have to dim automatically?
Are there quiet hours for digital billboards near homes?
Sources & Official References
Other rules in Lehi
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Billboard Lighting in Nearby Cities
How other cities in Utah County handle billboard lighting.