It is the purpose and intent of this Chapter to establish regulations and standards which will assist in substantially reducing light pollution which can be generated from commercial and residential lighting fixtures and devices; to minimize light pollution which has a detrimental effect on the environment and the enjoyment of the night sky, to reduce and minimize lighting practices which cause unnecessary illumination of adjacent properties, and to implement the Yucca Valley General Plan, Community Design Element, Policy 12, Program 12.A and Program 12.B. (Ord. 90, 3-19-1998)