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IES: Illuminating Engineering Society of North America

IES, the Illuminating Engineering Society of North America, is a nonprofit organization that develops and publishes standards regarding lighting. Headquartered in New York City, United States, IES standards are in effect throughout all of North America with its nearly 8,000 members. Internationally, IES collaborates with the International Commission on Illumination to promote uniformity with the rest of the world. Standards from IES are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: StandardsSubscriptions@ansi.org or 1-212-642-4980 or Request Proposal Price.

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ANSI/IES RP-8-18

Recommended Practice for Design and Maintenance of Roadway and Parking Facility Lighting

This Recommended Practice is a compilation of lighting design techniques and criteria, all offered for quality roadway lighting solutions. Each chapter should not be taken in isolation but used as a whole for quality lighting design for roadways and other environments where vehicles are present, such as tunnels, intersections, and parking lots. ANSI/IES RP-8-18 is a substantial revision to previous versions of ANSI/IES RP-8 in that it is an aggregation of several IES Standards covering roadway and parking facility lighting. This document supersedes the following IES Standards: RP-8-14, Roadway Lighting; RP-20-14, Lighting for Parking Facilities (revised 2016); RP-22-11, Tunnel Lighting; DG-4-14, Design Guide for Roadway Lighting Maintenance; DG-19-08, Design Guide for Roundabout Lighting; DG-21-15, Design Guide for Residential Street Lighting; DG-23-14, Design Guide for Toll Plazas; DG-26-16, Design Guide for Lighting the Roadway in Work Zones; DG-28-15, Design Guide for Selection, Installation, Operations and Maintenance of Roadway Lighting Control Systems; LM-50-13, Photometric Measurement of Roadway and Street Lighting Installations; LM-71-14, Photometric Measurement of Tunnel Lighting Installations; TM-10-00(R2011), Addressing Obtrusive Light (Urban Sky Glow and Light Trespass) in Conjunction with Roadway Lighting


ANSI/IES RP-7-20

Recommended Practice: Lighting Industrial Facilities

The primary purpose of this standard is to serve as a guide and educational tool for the design of permanently installed lighting systems for industrial facilities. This Recommended Practice deals entirely with lighting and does not give advice on the construction of a facility. The scope of this practice covers the design of new indoor and outdoor lighting systems for new industrial facilities as well as the redesign  of lighting systems in existing industrial facilities. Recommendations are based on quality lighting practices, including: the safe movement of vehicles and people, enhancing the productivity and comfort of employees, conserving energy, and minimizing maintenance. Recommended minimum maintained lighting levels and maximum uniformity ratio guidelines are provided but are subject to variation for special circumstances when based upon sound engineering judgment.


IES G-1-16

Guideline on Security Lighting for People, Property, and Public Spaces

This document is intended to provide specific guidelines for situations where it has been determined that security is an issue and is an important determining factor in the design or retrofit of a given property.This publication includes specific sections dealing with critical infrastructure and homeland security. In addition, we have incorporated many of the lessons learned and applied by these agencies throughout.


ANSI/IES RP-7-17

Recommended Practice for Lighting Industrial Facilities

The primary purpose of this standard is to serve as a guide and educational tool for the design of permanently installed lighting systems for industrial facilities.


ANSI/IES LM-79-19

Approved Method: Optical and Electrical Measurements of Solid-State Lighting Products

This approved method describes the procedures to be followed and precautions to be observed in performing reproducible accurate measurements of total luminous, radiant, or photon flux; electrical power; system efficacy; luminous, radiant, or photon intensity distribution; and color quantities and/or spectrum of solid-state lighting (SSL) products for illumination purposes, under standard conditions. This approved method covers LED luminaires, OLED luminaires, integrated LED lamps, integrated OLED lamps, non-integrated LED lamps operated with a driver designated by a manufacturer’s identification number or by a defined [ANSI] reference circuit, and LED light engines, all of which will be referred to as SSL products or device under test (DUT). SSL products, excluding non-integrated LED lamps, are intended to directly connect to AC mains power or to a DC voltage power supply to operate.


ANSI/IES RP-29-16

Lighting for Hospitals and Healthcare Facilities (Corrected edition)

The objective of this document is to provide context, define challenges, and identify recommended lighting design practices for healthcare-specific environments. This document is not prescriptive but is intended to provide guidance and to inspire by identifying possibilities that enable designers to develop the appropriate solutions for complex situations and spaces.


ANSI/IES RP-1-20

Recommended Practice: Lighting Offices Spaces

By maintaining a focus on lighting quality and human visual performance, and using the available technology, lighting practitioners can light the workplace more effectively. Their careful attention to the details and willingness to work with and educate other members of the design team (architects, engineers, interior designers, owners, and users) will ensure the best possible use of available resources in design solutions that are cost effective, environmentally sustainable, and yield higher workplace satisfaction and, consequently, enhanced organizational productivity.


ANSI/IES TM-21-19

Technical Memorandum: Projecting Long Term Lumen, Photon and Radiant Flux Maintenance of LED Light Sources

This document provides recommendations for projecting flux maintenance of LED light sources using data obtained when testing them per ANSI/IES LM-80-15, Approved Method for Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays and Modules.


ANSI/IES LM-80-20

Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays, and Modules

LEDs typically exhibit very long operational life characteristics and, depending on drive current and use conditions, can be in use for 50,000 hours or longer.The light output from LEDs slowly decreases over time. This characteristic of declining output without sudden and permanent failure creates a risk that an LED-based lighting product near end of life may be operating but performing outside the product’s specification, or outside required codes, standard practices, or regulations. LEDs may also undergo gradual shifts in the emitted spectrum over time that may result in unacceptable appearance or color rendering, or degraded efficacy. This Approved Method describes the procedures by which LEDs are tested for luminous (or radiant, or photon) flux maintenance, and chromaticity maintenance or wavelength changes over time when operated under controlled environmental and operational conditions. The resulting measurements may be used for comparison of LEDs, and they may be utilized in models that project long-term changes in light output during the life of the LEDs.


ANSI/IES LM-63-19

Approved Method: IES Standard File Format for the Electronic Transfer of Photometric Data and Related Information

This document describes the standard data system and how to build a file using this system. The document addresses photometric data file formats specifically for data transfer, data storage and retrieval, and other data usage purposes.


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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