Jul 22, 2020

Discover IES Standards through our cloud-based platform

Our standards library is unique in the lighting industry because of our attention to quality, topic breadth, and diversity of expertise. A full Lighting Library™ subscription includes access to all IES lighting standards. A subscription to one or more of our five collections (priced separately) within the Lighting Library is also available. These collections combined include over 100 ANSI-approved lighting standards, and are described below.

Features include:

  • Personalized homepage links to your bookmarks and notes
  • Always up-to-date standards and guidelines
  • Tools for locating illuminance values quickly
  • Links to articles and research referenced within standards
  • And much more!
    Work more efficiently, stay current and demonstrate your credibility by applying standards to your projects.

Work more efficiently, stay current and demonstrate your credibility by applying standards to your projects.

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Lighting Applications Standards Collection

How do I design a lighting system for a (fill in the blank)? This collection has detailed design criteria for commercial, residential, industrial, museum, healthcare and many other applications. Each standard also includes detailed recommended illuminance criteria, laid out in clear and concise tables, all designed to guide you to design a quality lighting installation.

 Includes access to The Interactive Illuminance Selector.

Document Title
ANSI/IES ANSI/IES RP-1-20 Recommended Practice: Lighting Offices Spaces
ANSI/IES RP-2-20 Recommended Practice: Lighting Retail Spaces
ANSI/IES RP-3-20 Recommended Practice: Lighting Educational Faciities
ANSI/IES RP-4-20 Recommended Practice: Lighting Library Spaces
ANSI/IES RP-6-20 Recommended Practice: Lighting Sports and Recreational Areas
ANSI/IES RP-7-20 Recommended Practice: Lighting Industrial Facilities
ANSI/IES RP-10-20 Recommended Practice: Lighting Common Applications
ANSI/IES/ALA RP-11-20 Lighting for Interior and Exterior Residential Environments
ANSI/IES RP-28-20 Recommended Practice: Lighting and the Visual Environment for Older Adults and the Visually Impaired
ANSI/IES RP-29-22 Recommended Practice: Lighting Hospital and Healthcare Facilities
ANSI/IES RP-30-20 Recommended Practice: Lighting Museums
ANSI/IES RP-37-22 Recommended Practice: Lighting Airport Outdoor Environments (Heliport addition)
ANSI/IES/AVIXA RP-38-17 Lighting Performance for Small to Medium Sized Videoconference Rooms
ANSI/IES RP-39-19 Recommended Practice: Off-Roadway Sign Luminance
ANSI/IES RP-40-19 Recommended Practice: Lighting Port Terminals
ANSI/IES RP-41-20 Recommended Practice: Lighting Theaters and Worship Spaces
ANSI/IES RP-43-22 Recommended Practice: Lighting Exterior Applications
ANSI/IES RP-44-21 Recommended Practice: Ultraviolet Germicidal Irradiation (UVGI)
ANSI/IES RP-45-21 Recommended Practice: Lighting Horticultural Facilities
ANSI/IES TM-24-20 Technical Memorandum: An Optional Method for Adjusting the Recommended Illuminance for Visually Demanding Tasks within IES Illuminance Categories P through Y Based on Light Source Spectrum
ANSI/IES RP-9-23 Recommended Practice: Lighting Hospitality  Spaces

Lighting Measurements and Testing Standards Collection

This collection establishes the testing and measurement standards for light sources, with the goal of providing a reliable and consistent system for calculating and measuring designed and installed illumination systems. Photometric, optical and electrical, color and color maintenance, life testing, and thermal testing are all included in this Collection.

ANSI/IES LM-9-20Approved Method: Electrical and Photometric Measurement of Fluorescent Lamps
ANSI/IES LM-20-20Approved Method: Photometry of Reflector Type Lamps
ANSI/IES LM-45-20Approved Method: Electrical and Photometric Measurements of General Service Incandescent Filament Lamps
ANSI/IES LM-51-20Approved Method: Electrical and Photometric Measurement of High Intensity Discharge Lamps
ANSI/IES LM-66-20Approved Method: Electrical and Photometric Measurements of Single-Based Fluorescent Lamp
ANSI/IES LM-85-20Approved Method: Optical and Electrical Measurements of LED Packages and Arrays0
ANSI/IES LM-88-18Approved Method: Optical and Electrical Measurements of AC-LED Packages and Arrays or Modules
ANSI/IES TM-31-20Technical Memorandum: Measurement Uncertainty for Lighting Equipment Calibration Using Integrating Spheres
ANSI/IES LS-3-20Lighting Science: Physics and Optics of Radiant Energy
ANSI/IES LS-4-20Lighting Science: Measurement of Light – The Science of Photometry
ANSI/IES/IUVA LM-92-22Approved Method: Electrical and Optical Measurements of Ultraviolet LEDs
ANSI/IES LM-10-20Approved Method: Photometric Testing of Roadway and Area Lighting Fluorescent Luminaires
ANSI/IES LM-11-20Approved Method: Photometric Measurement of Searchlights Using Incandescent or HID Sources
ANSI/IES LM-31-20Approved Method: Photometric Testing for Roadway and Area Lighting Luminaires Using Incandescent or High Intensity Discharge Lamps
ANSI/IES LM-35-20Approved Method: Photometric Testing of Floodlights Using High Intensity Discharge or Incandescent Lamps
ANSI/IES LM-37-20Approved Method: Guide for Determination of Average Luminance (Calculated) for Indoor Luminaires
ANSI/IES LM-41-20Approved Method: Photometric Testing of Indoor Fluorescent Luminaires
ANSI/IES LM-46-20Approved Method: Photometric Photometric Testing of Indoor Luminaires Using High Intensity Discharge or Incandescent Filament Lamps
ANSI/IES LM-72-20Approved Method: Directional Positioning of Photometric Data
ANSI/IES LM-73-18“Approved Method: Photometric Testing of Entertainment Lighting Luminaires Using Incandescent Filament Lamps or High Intensity Discharge Lamps
ANSI/IES LM-75-19Approved Method: Goniophotometer Types and Photometric Coordinates
ANSI/IES LM-77-20Approved Method: Intensity Distribution Measurement of Luminaires and Lamps Using Digital Screen Imaging Photometry
ANSI/IES LM-81-20Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices Under Hemispheric Sky Conditions
ANSI/IES TM-15-20Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions
ANSI/IES LM-91-22Approved Method: Application Distance Radiometry
ANSI/IES LM-28-20Approved Method: IES Guide for the Selection, Care, and Use of Electrical Instruments in the Photometric Laboratory
ANSI/IES LM-48-20Approved Method: Testing the Calibration of Locking Type Photoelectric Control Devices Used in Outdoor Applications
ANSI/IES LM-54-20Approved Method: IES Guide to Lamp Seasoning
ANSI/IES LM-58-20Approved Method: Spectroradiometric Measurement Methods for Light Source
ANSI/IES LM-61-20Approved Method: Identifying Operating Factors for Installed High Intensity Discharge Luminaires
ANSI/IES LM-62-20Approved Method: Laboratory or Field Thermal Measurements of Fluorescent Lamps and Ballasts in Luminaires
ANSI/IES LM-78-20Approved Method: Total Luminous Flux Measurement of Lamps using an Integrating Sphere Photometer
ANSI/IES LM-79-19Approved Method: Optical and Electrical Measurements of Solid-State Lighting Products
ANSI/IES LM-82-20Approved Method: Characterization of Optical and Electrical Properties of Solid-State Lighting Products as a Function of Temperature
ANSI/IES LM-90-20Approved Method: Measuring Luminous Flux Waveforms for Use in Temporal Light Artifact (TLA) Calculations
ANSI/IES TM-38-21Technical Memorandum: Photometric and Electrical Measurements of Tunable-White Solid-State Lighting Products
ANSI/IES LM-40-20Approved Method: Life Testing of Fluorescent Lamps
ANSI/IES LM-47-20Approved Method: Life Testing of High Intensity Discharge (HID) Lamps
ANSI/IES LM-49-20Approved Method: Life Testing of Incandescent Filament Lamps
ANSI/IES LM-65-20Approved Method: Life Testing of Single-Based Fluorescent Lamps
ANSI/iES LM-80-21Approved Method: Measuring Maintenance of Light Output Characteristics of Solid State Light Sources
ANSI/IES LM-84-20Approved Method: Measuring Optical Radiation Maintenance of LED Lamps, Light Engines, and Luminaires
ANSI/IES LM-86-20Approved Method: Measuring Luminous Flux and Color Maintenance of Remote Phosphor Components
ANSI/IES TM-21-21Technical Memorandum: Projecting Long-Term Lumen, Photon, and Radiant Flux Maintenance Of LED Light Sources
ANSI/IES TM-26-20Technical Memorandum: Projecting Catastrophic Failure Rate of LED Packages
ANSI/IES TM-28-20Technical Memorandum: Projecting Long-Term Luminous Flux Maintenance of LED Lamps and Luminaires
ANSI/IES TM-35-19Technical Memorandum: Projecting Long-Term Chromaticity Coordinate Shift of LED Packages, Arrays, and Modules
ANSI/IES LM-83-23Approved Method: IES Spatial Daylight Autonomy (SDA) and Annual Sunlight Exposure (ASE)
ANSI/IES TM-37-22Technical Memorandum: Description, Measurement, and Estimation of Sky Glow

Lighting Practice Standards Collection

The practice of lighting design and illuminating engineering are detailed in this collection, providing basic design principles for indoor and outdoor environments, descriptions light sources, luminaires, and control systems, lighting upgrades, lighting system commissioning, lighting economics, lighting maintenance and other aspects involved with the design, installation, and construction for lighting system. ANSI/IES OL-IM-02

Document Title
ANSI/IES LP-1-20 Lighting Practice: Designing Quality Lighting for People and Buildings
ANSI/IES LP-2-20 Lighting Practice: Designing Quality Lighting for People in Outdoor Environments
ANSI/IES LP-3-202 Lighting Practice: Designing and Specifying Daylighting for Buildings
ANSI/IES LP-4-20 Lighting Practice: Electric Light Sources – Properties, Selection, and Specification
ANSI/IES LP-6-20 Lighting Practice: Lighting Control Systems – Properties, Selection, and Specification
Lighting Practice: The Lighting Design and Construction Process
ANSI/IES LP-8-20 Lighting Practice: The Commissioning Process Applied to Lighting and Control Systems
ANSI/IES LP-9-20 Lighting Practice: Upgrading Lighting Systems in Commercial and Industrial Facilities
ANSI/IES LP-10-20 Lighting Practice: Sustainable Lighting – An Introduction to the Environmental Impacts of Lighting
ANSI/IES LP-11-20 Lighting Practice: Environmental Considerations for Outdoor Lighting
ANSI/IES LP-12-21 Lighting Practice: IoT Connected Lighting
ANSI/IES LP-13-21 Lighting Practice: Introduction to Resilient Lighting Systems
ANSI/IES LP-16-22 Lighting Practice: Control Narrative
ANSI/IES RP-31-20 Recommended Practice: Economic Analysis of Lighting
ANSI/IES/NALMCO RP-36-20 Recommended Practice: Lighting Maintenance
ANSI/IES RP-42-20 Recommended Practice: Dimming and Control Method Designations
ANSI/IES TM-25-20 Technical Memorandum: Ray File Format for the Description of the Emission Properties of Light Sources
ANSI/IES TM-27-20 Technical Memorandum: IES Standard Format for the Electronic Transfer of Spectral Data
ANSI/IES TM-32-19 Lighting Practice: Lighting Parameters for Building Information Modeling
ANSI/IES TM-33-18 Standard File Format for the Electronic Transfer of Luminaire Optical Data
IES TM-34-19 Calculation Procedures and Specification Criteria for Lighting Calculations
IES G-1-16 Guide for Security Lighting for People, Property, and Critical Infrastructure

Lighting Science Standards Collection - Free for IES members!

Every engineering discipline requires a solid scientific foundation. This collection of standards includes the language and physics of lighting, vision and visual performance, color science, color appearance and rendition, photometry, non-visual effects of lighting, photobiology, lighting calculations and more. ANSI/IES OL-IM-01

 Free for IES members!

Document Title
ANSI/IES LS-1-22 Lighting Science: Nomenclature and Definitions for Illuminating Engineering
ANSI/IES LS-2-20 Lighting Science: Concepts and Language of Lighting
ANSI/IES LS-3-20 Lighting Science: Physics and Optics of Radiant Power
ANSI/IES LS-4-20 Lighting Science: Measurement of Light – The Science of Photometry
ANSI/IES LS-5-20 Lighting Science: Color
ANSI/IES LS-6-20 Lighting Science: Calculation of Light and Its Effects
ANSI/IES LS-7-20 Lighting Science: Vision – Eye and Brain
ANSI/IES LS-8-20 Lighting Science: Vision – Perceptions and Performance
ANSI/IES RP-27-20 Recommended Practice: Photobiological Safety for Lighting Systems
IES TM-18-18 Light and Human Health – An Overview of the Impact of Optical Radiation on Visual, Circadian, Neuroendocrine, and Neurobehavioral Responses
ANSI/IES TM-30-20 Technical Memorandum: IES Method for Evaluating Light Source Color Rendition
ANSI/IES TM-37-21 Technical Memorandum: Description, Measurement, and Estimation of Sky Glow

Lighting Roadway and Parking Facilities Standards Collection

Roadway Lighting design and engineering is unique due to the visual needs at night and the vehicle-to-vehicle and vehicle-to-pedestrian interaction. This standard covers all aspects of roadway lighting including streets and roadways, parking lots, intersections, toll plazas, tunnels, and work zones in addition to the environmental issues of light trespass and sky glow.

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.

A lighting designer will often simplify the design criteria to lighting level and uniformity. However, impacts on visual quality go beyond these simple criteria and encompass minimizing glare and providing spectral contrast on pedestrians, hazards, and other vehicles. All design criteria are important in order to achieve these goals

  1. Improve motorist visual quality
  2. Provide quality light and increased contrast for seeing hazards
  3. Illuminate conflict areas
  4. Minimize environmental impacts of light at night
  5. Employ lighting systems that are easily maintained and minimize energy use

This Standard was prepared with the objective of providing lighting design guidance for most kinds of roadway and roadway-related applications. The recommendations contained in this document, however, may not reflect specific local factors or situations that are not typical and require special treatment. The contents of this Standard are based upon a consensus of roadway lighting experts. It has no legislative authority unless adopted by an authority having jurisdiction. This Recommended Practice is not intended to establish a basis for civil liability.

This Standard is intended to be a single source of reference for roadway lighting; however, additional documents such as electric codes, transportation design guides, and other codes and standards are often required design references.


The Lighting Library is a series of five collections of standards, including:
  • Lighting Applications Standards Collection
  • Lighting Measurements and Testing Standards Collection
  • Lighting Practice Standards Collection
  • Lighting Science Standards Collection
  • Roadway and Parking Facility Lighting Standards Collection
Click here to view descriptions and contents of each collection.
IES Lighting Library Collections


Subscriptions to the Lighting Library can be purchased by an individual, or as a Sustaining Member benefit.

Individual Lighting Library Subscription:

Lighting Library Subscription (all 5 collections): IES Member rate: $199 Non-member rate: $499 To purchase a Lighting Library subscription either to individual collections or to the library in full, visit our IES webstore.

*Individual subscriptions to standalone collections are also available.

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