May 14, 2021
The IES Lighting Library


The Lighting Library® is a newly formulated 5-collection series of IES standards that updates, expands, and replaces The 2010 Lighting Handbook and previous versions of our standards. All content within the Library has been vetted and approved by our ANSI-approved IES consensus process, with most of the nearly 100 standards having attained American National Standard status. To see the index of standards within any of the collections, simply click the ‘+’ sign next to ‘Standards Contained in this Collection’.


Lighting Applications Standards Collection Subscription

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.


  • IES G-1-16        Guide for Security Lighting for People, Property, and Critical Infrastructure
  • 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 Facilities
  • 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-9-20      Recommended Practice: Lighting Hospitality Spaces
  • 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-29-20      Recommended Practice: Lighting Hospital and Healthcare Facilities
  • ANSI/IES RP-30-20      Recommended Practice: Lighting Museums
  • ANSI/IES RP-37-20      Recommended Practice: Lighting Airport Outdoor Environments
  • ANSI/IES/AVIXA RP-38-17      Lighting Performance for Small to Medium Sized Videoconference Rooms
  • ANSI/IES RP-39-19      Recommended Practice for 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-44-21      Recommended Practice: Ultraviolet Germicidal Irradiation (UVGI)
  • ANSI/IES RP-45-21      Recommended Practice: Horticultural Lighting
  • 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

Lighting Measurements and Testing Standards Collection Subscription

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-9-20         Approved Method: Electrical and Photometric Measurement of Fluorescent Lamps
  • ANSI/IES LM-10-20       Approved Method: Photometric Testing of Roadway and Area Lighting Fluorescent Luminaires
  • ANSI/IES LM-11-20        Approved Method: Photometric Measurement of Searchlights
  • ANSI/IES LM-20-20       Approved Method: Photometry of Reflector Type Lamps
  • ANSI/IES LM-28-20       Approved Method: Guide for the Selection, Care and Use of Electrical Instruments in the Photometric Laboratory
  • ANSI/IES LM-31-20        Approved Method: Photometric Testing for Roadway Luminaires-Incandescent & HID
  • ANSI/IES LM-35-20       Approved Method: Photometric Testing of Floodlighting for HID or Incandescent Lamps
  • ANSI/IES LM-37-20       Approved Method: Guide for Determination of Average Luminance (Calculated) for Indoor Luminaires
  • ANSI/IES LM-40-20      Approved Method: Life Testing of Fluorescent Lamps (Reaffirmed 2017)
  • ANSI/IES LM-41-20       Approved Method: Photometric Testing of Indoor Fluorescent Luminaires
  • ANSI/IES LM-45-20      Approved Method: Electrical and Photometric Measurements of General Service Incandescent Filament Lamps
  • ANSI/IES LM-46-20      Approved Method: Photometric Testing of Indoor Luminaires Using HID or Incandescent Filament Lamps
  • ANSI/IES LM-47-20      Approved Method: Life Testing of High Intensity Discharge (HID) Lamps
  • ANSI/IES LM-48-20      Approved Method: Testing Calibration of Locking Type Photoelectric Control Devices
  • ANSI/IES LM-49-20      Approved Method: Life Testing of Incandescent Filament Lamps
  • ANSI/IES LM-51-20       Approved Method: Electrical and Photometric Measurement of High Intensity Discharge Lamps
  • ANSI/IES LM-54-20      Approved Method: Guide to Lamp Seasoning
  • ANSI/IES LM-58-20      Approved Method: Spectroradiometric Measurement Methods for Light Sources
  • ANSI/IES LM-61-20      Approved Method: Identifying Operating Factors for Installed High Intensity Discharge Luminaires
  • ANSI/IES LM-62-20      Approved Method: Laboratory or Field Thermal Measurements of Fluorescent Lamps and Ballasts in Luminaires
  • ANSI/IES LM-65-20      Approved Method: Life Testing of Single-Based Fluorescent Lamps
  • ANSI/IES LM-66-20      Approved Method: Electrical and Photometric Measurements of Single-Based Fluorescent Lamp
  • ANSI/IES LM-72-20      Approved Method: Directional Positioning of Photometric Data
  • ANSI/IES LM-73-18      Approved Method: Photometric Testing of Entertainment Luminaires Using Incandescent Filament Lamps or High Intensity Discharge Lamps
  • ANSI/IES LM-75-19       Approved Method: Goniophotometer Types and Photometric Coordinates
  • ANSI/IES LM-77-20      Approved Method: Intensity Distribution Measurement of Luminaires and Lamps Using Digital Screen Imaging Photometry
  • ANSI/IES LM-78-20      Method: Total Luminous Flux Measurement of Lamps using an Integrating Sphere Photometer
  • ANSI/IES LM-79-19       Approved Method: Electrical and Photometric Measurements of Solid State Lighting Products
  • ANSI/IES LM-80-20     Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays and Modules
  • ANSI/IES LM-81-20      Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices Under Hemispheric Sky Conditions
  • ANSI/IES LM-82-20      Approved Method: Characterization of LED Light Engines and LED Lamps for Electrical and Photometric Properties as a Function of Temperature
  • ANSI/IES LM-84-20      Approved Method: Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, and Luminaires
  • ANSI/IES LM-85-20      Approved Method: Electrical and Photometric Measurements of High-Power LEDs
  • ANSI/IES LM-86-20      Approved Method: Measuring Luminous Flux and Color Maintenance of Remote Phosphor Components
  • ANSI/IES LM-88-18      Approved Method: Optical and Electrical Measurements of AC-LED Packages and Arrays or Modules
  • ANSI/IES LM-90-20      Approved Method: Measuring Luminous Flux Waveforms for Use in Temporal Light Artifact (TLA) Calculations
  • ANSI/IES TM-21-19       Technical Memorandum: Projecting Long Term Lumen Maintenance of LED Light Sources (+ Addendum)
  • ANSI/IES TM-26-20      Technical Memorandum: Projecting Catastrophic Failure Rate of LED Packages
  • ANSI/IES TM-27-20      Technical Memorandum: Standard Format for the Electronic Transfer of Spectral Data
  • ANSI/IES TM-28-20      Technical Memorandum: Projecting Long-Term Luminous Flux Maintenance of LED Lamps and Luminaires
  • ANSI/IES TM-31-20      Technical Memorandum: Measurement Uncertainty for Lighting Equipment Calibration Using Integrating Spheres
  • ANSI/IES TM-35-19      Techincal Memorandum: Projecting Long-Term Chromaticity Coordinate Shift of LED Packages, Arrays, and Modules
  • ANSI/IES TM-38-21      Technical Memorandum: Photometric and Electrical Measurements of Tunable-White Solid-State Lighting Products

Lighting Practice Standards Collection Subscription

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


  • 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-3-30      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
  • ANSI/IES LP-7-20      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 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 LM-63-19      Approved Method: Standard File Format for the Electronic Transfer of Photometric Data and Related Information
  • ANSI/IES LM-83-20      Approved Method: Spatial Daylight Autonomy (sDA) and Annual Sunlight Exposure (ASE)
  • ANSI/IES TM-15-20      Luminaire Classification System for Outdoor Luminaires
  • 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: Building Information Management
  • ANSI/IES TM-33-18      Standard File Format for the Electronic Transfer of Luminaire Optical Data
  • IES TM-34-19      Lighting Practice: Calculation Procedures and Specification Criteria for Lighting Calculations

Lighting Science Standards Collection Subscription

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


  • ANSI/IES LS-2-20      Lighting Science: Concepts and Language of Lighting
  • ANSI/IES LS-3-30      Lighting Science: Physical and Optics of Radiant Power
  • ANSI/IES LS-4-20      Lighting Science: Measurement of Light – The Science of Photometry
  • ANSI/IES LS-5-21      Lighting Science: Color
  • ANSI/IES LS-6-20      Lighting Science: Calculation of Light and Its Effect
  • 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-30-18    IES Method for Evaluating Light Source Color Rendition

Lighting Roadway and Parking Facilities Standards Collection Subscription

ANSI/IES RP-8-21 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 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.