Dobbins JLUS IMP Public Draft Light Pollution Study | Page 56
Model Lighting Ordinance
The International Dark‐Sky Association (IDA) Model Lighting Ordinance
(MLO) provides a framework for establishing outdoor lighting restrictions
based on curbing the various contributors to light pollution, glare, and light
trespass. The MLO provides different innovations for regulating outdoor
lighting, including:
The use of five lighting zones to classify land use with appropriate
lighting levels for each. Zones range from LZ‐0, designed for pristine
natural environments and limited outdoor lighting, to LZ‐4, for
limited application in areas of extensive development in the largest
cities
Limits on the amount of light used for each property
Use of the IES’s TM‐15‐11 “BUG” (Backlight, Uplight and Glare)
classification of outdoor lighting fixtures to ensure that only
well‐shielded fixtures are used. No uplight for area and street