18.02.090 Sign lighting.
1. General Lighting Standards. The following requirements shall apply to exterior sign lighting of any commercial, industrial, or office development. These requirements are applicable to sign lighting.
a. Lighting shall be stationary. No lighting shall blink, flash, or be of unusually high intensity or brightness so as to be distracting to motorists or other properties within the vicinity.
b. Lighting shall be shielded or recessed so that direct glare and reflections are contained within the boundaries of the parcel.
c. Light poles shall not be used to display signs of any kind.
d. Neon lights, strings or lines of LED lighting, other electrically activated gas tubing or similar lighting placed around the perimeter of a sign is prohibited. Neon tubing may only be allowed to illuminate or outline wording, copy, or logos within a sign face.
2. Signage Illumination Limits. The following criteria shall be used to determine proper illumination limits for all signs:
a. The illumination of, or light produced by, any sign shall not increase nighttime ambient light levels by more than 0.3 footcandles as measured by an illuminance meter (footcandle meter) placed five (5) feet above the ground and perpendicular to the sign face at a distance determined by the following formula:
b. At the distance determined by the formula in Subsection 18.02.060(2)(a) above, illuminance levels shall be measured with the sign lighting turned on, and again with the sign lighting turned off. The difference between the illumination measurements taken at the appropriate distance shall not exceed 0.3 footcandles. For digital signs (electronic changeable copy signs) the difference between the on and off illuminance levels shall be measured while displaying:
i. A solid white screen image (for a full color-capable display), and the sign lighting turned off; or
ii. A solid screen image (for a single-color display), and the sign lighting turned off.
3. Dimmer. All electronic message center signs shall come equipped with automatic dimming technology which automatically adjusts the sign’s brightness in direct correlation with ambient light conditions at all times.
4. Upon receiving reasonable written notice from Lindon City, all sign owners shall cooperate with the city in order to test signage illumination limits. (Ord. 2022-18, amended, 2022; Ord. 2005-12, amended, 2005; Ord. 2002-21, amended, 2002)