Light levels shall be measured with a direct-reading, portable light meter, calibrated within the last year by an independent laboratory regularly engaged in the calibration of such instruments. The meter’s sensor shall be located at the top of the visual screening fence on the property line (or at a height of three feet above the surrounding local grade if there is no fence), aimed towards the subject property in horizontal position. Readings shall be recorded after the value has stabilized. Measurements are made after establishment of darkness with the light sources to be measured illuminated, and then with those light sources extinguished. The difference between these two readings will then be compared to the maximum allowed illumination at the property line. In this way, contributions to light levels by the moon and other ambient light sources are eliminated and the light intensity from the sources in question can be determined.
(Ord. 382, passed 7-8-2021)