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9. Consider maximum brightness levels that correlate to ambient (day or night condition, <br />lighting of surrounding context) light levels. A maximum daytime and separate <br />nighttime nit /footcandle level should be established. Consider wording that requires the <br />sign to automatically adjust its nit level based on ambient light conditions. <br />10. Consider a requirement for a written certification from the sign manufacturer that the <br />individual sign's maximum light intensity has been preset not to exceed the maximum <br />daytime illumination levels established by the code, and that the maximum intensity level <br />is protected from end user manipulation by password protected software or other method <br />approved by the appropriate city official. <br />11. Require sign owners to provide an accurate field method of ensuring that maximum light <br />levels are not exceeded. If such a method cannot technically be provided, consider <br />banning dynamic signs that emit light until such time as the technology is available. <br />431 <br />