Illuminating Engineering Society of North America

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Illuminating Engineering Society
Formation1906; 112 years ago (1906)[1]
Legal statusNon-profit organization
PurposeTo communicate information on all aspects of good lighting practice
HeadquartersWall Street, New York City, USA
  • North America
over 8,000[2]

The Illuminating Engineering Society (IES) is a non-profit learned society that was founded in New York City on January 10, 1906. The IES's stated mission is to improve the lighted environment by bringing together those with lighting knowledge and by translating that knowledge into actions that benefit the public. Members of the IES are regarded as professionals in their industry and are globally respected for their knowledge. The Society is still headquartered in New York City, with offices at 120 Wall Street.


The IES is credited with over 100 publications on the subject of lighting such as The Lighting Handbook: 10th Edition,[3] the recognized authoritative reference on the science and application of lighting. Other publications, many of which are ANSI standards, include recommended practices for a variety of specific lighting applications such as office, sports, and outdoor lighting, and lighting for healthcare facilities. All IES publications are developed through consensus committee work. The National Institute of Standards and Technology (NIST) references several IES publications for Optical Radiation Calibrations.[4] The International Dark-Sky Association (IDA) makes several references to the IES and its publications in its Outdoor Lighting Code Handbook.[5]

The IES is a joint sponsor of ASHRAE/IES Standard 90.1 and Standard 189 and collaborates on other documents. In addition, the IES publishes LEUKOS, the Journal of the Illuminating Engineering Society, and LD+A (Lighting, Design + Application), a monthly magazine.


The IES has about 8,000 members worldwide, mostly in the United States, Canada, and Mexico, although there are members in other countries. Members include engineers, lighting designers, consultants, lighting equipment manufacturers, sales professionals, electrical contractors, architects, researchers and academics.


The IES is divided into approximately 100 local sections. The IES holds its Annual Conference and Street and Area Lighting Conference (SALC). The IES is a sponsor of LIGHTFAIR International.[6] Local sections offer lighting education classes and meet regularly to offer a technical program to its members.


  1. ^ "About the IES". Illuminating Engineering Society. Retrieved 23 May 2014.
  2. ^ "IES About Profile". Illuminating Engineering Society. Retrieved 23 May 2014.
  3. ^ [1] IES Lighting Handbook
  4. ^ "National Institute of Standards and Technology, Optical Technology Division". Archived from the original on 2007-07-01. Retrieved 2007-08-01.
  5. ^ Outdoor Lighting Code Handbook, Ver 1.4, September 2002
  6. ^ LIGHTFAIR International

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