Meeting/Event Information

Model Lighting Ordinance (MLO) Review

November 07, 2017
5:30 PM to 8:00 PM
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Philips Lighting Innovation Center
2 Canal Park
Cambridge, MA 02141


Nancy E. Clanton is founder and President of Clanton & Associates, a lighting design firm specializing in sustainable design. She obtained her Bachelor of Science degree (Architectural Engineering, Illumination Emphasis) from the University of Colorado, Boulder and is a registered Professional Engineer in the states of Colorado and Oregon. Nancy is a member of the National Science Foundation committee on the assessment of solid state lighting. Nancy was co-chair of the Model Lighting Ordinance IESNA and IDA joint task force that developed the MLO. Nancy is chairperson of the IESNA Lighting for Outdoor Public Spaces Committee and past chair of the Outdoor Environmental Lighting Committee and Mesopic Committee, past member of the IES Board of Directors, the IDA Board of Directors, and the IALD Board of Directors. Nancy has served on the USGBC LEED Environmental Quality Technical Advisory Group. Nancy was a topic editor for the IES Lighting 9th Edition Handbook and her committee was responsible for the production of the IES Recommended Practice on Lighting for the Exterior Environment. Nancy was lighting group leader for Greening of the White House, led the lighting workshops for the C40 conference in Seoul, and was awarded the IES Presidential Award in 1990 and 2006. Her firm has authored the Lighting Criteria for The Department of Defense Unified Facilities Criteria, Colorado Department of Transportation Lighting Design Guide and the exterior sections of California’s Title 24 energy code. Her firm’s lighting design projects reflect her sustainable philosophy and ten of their projects have been named to the AIA Committee on the Environment Earth Day Top Ten List. Thirteen projects for which Clanton & Associates designed the lighting are LEED platinum rated.



IES/IDA Model Lighting Ordinance (MLO) and TM-15-11 Outdoor Luminaire Classification System Seminar

The IDA/IES Model Lighting Ordinance (MLO) is an outdoor lighting ordinance template designed to help municipalities develop outdoor lighting ordinances that reduce glare, light trespass, and skyglow. This presentation will give an overview of the MLO with examples on how to apply it. Also, an overview of TM-15-11 Outdoor Luminaire Classification System commonly known as the BUG rating, will be presented since it is part of the MLO criteria.

The MLO was developed jointly by the International Dark Sky Association (IDA) and the Illuminating Engineering Society (IES). The IDA/IES partnership encourages broad adoption of comprehensive outdoor lighting ordinances. Any community, regardless of size, can use the MLO to develop proven, comprehensive, and environmentally sound outdoor lighting practices without devoting extensive staff time and resources to their development. The user’s guide explains the technical details of the regulation template using everyday terminology and examples.

Several unique features allow the MLO to be customized. The first innovation is the use of five lighting zones to classify land use and to implement appropriate lighting levels for each. Zones range from LZ0, designed for pristine natural environments and limited outdoor lighting, to LZ4, for limited application in areas of extensive development in the largest cities.

The second innovation limits the amount of light used for each property. An individual parcel is given a lumen allowance based on the lighting zone, the size of the property, and the degree of development on the property.

Third, the MLO uses the IES’s TM-15 -11, Addendum A "BUG" (Backlight, Uplight and Glare) classification of outdoor luminaires to ensure that only well-shielded luminaires are used. No uplight for area and street lighting is allowed in any zone.


Learning Objectives:

1.           Understand the MLO purpose and impact

2.           Learn how to apply the MLO prescriptive method

3.           Experience the MLO performance method




Philips Lighting Innovation Center

2 Canal Park, Cambridge, MA 02141





November 7, 2017

5:30-6:00 PM Registration

6:00-8:00 PM Presentation


$20.00 Member Ticket

$30.00 Guest Ticket

$15.00 Student/EP