MODEL LIGHTING ORDINANCE - USER ’ S GUIDE
The User Notes The User Notes are intended to clarify the sections of the MLO for the various audiences who will use it : lighting designers , city officials , engineers , citizen groups , and others . Every effort has been made to keep the language technically accurate and clear , but since different disciplines may use the same term in different ways , or have different interpretations , some guidance may be helpful . While these Notes can not be a full tutorial on modern lighting design , it is hoped that the Notes will help facilitate the dialogue necessary to adopt the MLO .
Background The problems of light pollution first became an issue in the 1970s when astronomers identified the degradation of the night sky due to the increase in lighting associated with development and growth . As more impacts to the environment by lighting have been identified , an international “ dark sky ” movement is advocating for the precautionary approach to outdoor lighting design .
Many communities have passed anti-light-pollution laws and ordinances . However , there is little or no agreement among these laws , and they vary considerably in language , technical quality , and stringency . This is confusing for designers , engineers , and code officials . The lack of a common basis prevents the development of standards , educational programs , and other means of achieving the goal of effective lighting control .
This MLO will allow communities to drastically reduce light pollution and glare and lower excessive light levels . The recommended practices of the IES can be met using readily available , reasonably priced lighting equipment . However , many conventional lighting practices will no longer be permitted , or will require special permits .
This Model Lighting Ordinance ( MLO ) is the result of extensive efforts by the International Dark Sky Association ( IDA ) and the Illuminating
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Page B-2 Appendix B : Model Lighting Ordinance