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This Section provides standards for outdoor lighting in the Valley Region.
(a) Light Trespass Prohibited. Outdoor lighting of commercial or industrial land uses shall be fully shielded to preclude light pollution or light trespass on any of the following:
(1) An abutting residential land use zoning district;
(2) A residential parcel; or
(3) Public right-of-way.
(b) Determination of Light Trespass. A determination of light trespass shall be made through a quantitative measurement utilizing a standard yardstick (three feet x one and one-half inches). The yardstick shall be placed at the building setback line in the complainant’s yard. The yardstick shall be in contact with the ground or may be raised to window level of the dwelling and in a vertical position. The person taking the measurement shall then determine if a shadow is cast by the light source, that is, the light source, yardstick, and shadow shall be in alignment. Measurements shall not be taken when there is a moon in the night sky.
(c) Maximum Allowed Foot-candles. Direct or indirect light from any light fixture shall not cause glare above five-tenths foot-candles when measured at the property line of a residential land use zoning district, residential parcel, or public right-of-way. Light levels shall be measured with a photoelectric photometer, following the standard spectral luminous efficiency curve adopted by the International Commission on Illumination.
(Ord. 4011, passed - -2007)