(1) The following nighttime brightness standards shall apply beginning thirty (30) minutes after sunset and ending thirty (30) minutes before sunrise. No electronic display sign shall exceed a nighttime brightness level of two hundred (200) candelas per square meter (nits) in the LZ2 lighting zone or three hundred (300) candelas per square meter (nits) in the LZ3 lighting zone.

(2) Notwithstanding Subsection (1) of this Section, signs adjacent to and facing Interstate 15 are exempt from the nighttime brightness standard.

(3) Prior to the issuance or renewal of a business license, the owner of an electronic display sign shall provide the City with a certification from the sign manufacturer stating that the sign is capable of complying with the above brightness provisions.

(4) An electronic display sign that was in operation prior to May 28, 2013, and that is not reasonably capable of complying with the brightness standards in this Section is not subject to the requirements of this Section so long as the sign is not replaced, reconstructed, upgraded, moved, or otherwise substantially changed.