18.70.130 Electronic display signs.
(1) All electronic display signs shall meet the following standards:
(a) The change from one electronic display to another electronic display shall be no more frequent than once every eight seconds.
(b) The actual change of display for an electronic display sign shall be completed in two seconds or less. Displays may change by fade or by instantaneous change from one static display to another, but shall remain as a static display after completing the change and shall remain static until the next change.
(c) The display surface shall not create the appearance of movement nor shall the electronic display sign be illuminated by a flashing light or a light that varies in intensity.
(d) The electronic display sign shall be equipped with technology that automatically adjusts the sign’s luminance in direct correlation with ambient light conditions and in compliance with the following standards:
(i) Daytime Luminance Limits. No electronic display sign shall present a display or any part of a display that exceeds 3,000 nits between sunrise and sunset.
(ii) Nighttime Luminance Limits.
(A) No electronic display sign in nonresidential zones shall present a display or any part of a display that exceeds 150 nits between sunset and sunrise.
(B) No electronic display sign in a residential zone shall present a display or any part of a display that exceeds 100 nits between sunset and sunrise.
(2) In the event that any component of the sign, including but not limited to, its display, control, communication, design, or other operational component causes any portion of the display to fail or malfunction, including display brightness at luminance levels greater than those set forth herein, the sign owner or operator shall take immediate action to turn the display off, or reduce the entire display to its minimum possible luminance level. The display shall remain in this condition until the problem has been resolved. (Ord. 2061 § 1, 2022)