Individual Standards

ANSI/ASHRAE/IES 90.1-2025

Oct 31, 2025 · 44 pages

ANSI/IES RP-41-20

Recommended Practice: Lighting Theaters and Worship Spaces

Factors involved in achieving a successful, functioning space for live performances.

Jul 30, 2020 · 62 pages

ANSI/IES RP-37-25

Recommended Practice: Lighting Airport Outdoor Environments

Planning and design of lighting systems for airside, some landside, and adjacent airport areas, including apron areas for commercial use, general aviation, cargo, hangars, and remote aprons . RP-37 does not provide…

May 14, 2025 · 74 pages

ANSI/IES TM-32-24

Technical Memorandum: Lighting Parameters for Building Information Modeling

IES-recommended standardization of parameters attached to objects, object libraries, or parametric features that represent luminaires for use in many different types of BIM software.

Jun 28, 2024 · 18 pages

ANSI/IES LP-30-26

Lighting Practice: A Comprehensive Guide to Specifying Color Rendition - Concepts, Criteria, and Implementation

Provides the industry with guidance on the specification of TM-30 by expanding on the framework of TM-30 Annex E. The goal of this document is to help lighting specifiers understand color rendition…

Feb 12, 2026 · 45 pages

ANSI/IES LS-5-25

Lighting Science: Color

The understanding of the color properties of light and their applications is finding an unprecedented relevance in the lighting industry. As a result, lighting professionals are faced with an increased need for…

May 19, 2025 · 68 pages

ANSI/IES TM-30-24

Technical Memorandum: IES Method for Evaluating Light Source Color Rendition

Jul 31, 2024 · 54 pages

ANSI/IES TM-40-24

Technical Memorandum: IES Method for Determining Correlated Color Temperature (CCT) and Distance from the Planckian Locus of Light Sources

IES recommended method for computing the CCT and Duv of a light source, given the input of its chromaticity coordinates.

Jun 28, 2024 · 19 pages

ANSI/IES LM-63-19(R25)

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

Standard IES data system and how to build a file using this system. It also addresses photometric data file formats specifically for data transfer, data storage and retrieval, and other data usage…

Aug 14, 2025 · 31 pages

ANSI/IES LS-6-20(R2025)

Lighting Science: Calculation of Light and Its Effects

The purpose of this Lighting Science document is to provide the theoretical basis for lighting calculations, to describe how this theory is approximated and used, and to describe how it is embodied…

Dec 19, 2025 · 60 pages

ANSI/IES TM-27-20

Technical Memorandum: IES Standard Format for the Electronic Transfer of Spectral Data

Electronic (XML based) data format for the transfer of spectral data. This document may be used for the transfer of spectral data of optical radiation including light sources, lamps, and luminaires, as…

Feb 7, 2020 · 22 pages

ANSI/IES TM-33-23

Technical Memorandum: Standard Format for the Electronic Transfer of Luminaire Optical Data

lectronic (XML-based) data format for the transfer of luminaire optical data useful for lighting design and analysis. This document is intended as a description of a specific implementation of an XML document,…

Jul 18, 2023 · 128 pages

ANSI/IES TM-41-24

Technical Memorandum: Standard Format for the Electronic Data Transfer of Light Output Maintenance Characteristics of Solid-State Light Sources

This Technical Memorandum (TM) describes the storage and transfer file format for LM-80 maintenance test data in XML format, for solid-state light sources, such as LED packages, arrays, and modules; or laser…

Dec 5, 2024 · 41 pages

ANSI/IES LM-83-23

Approved Method: IES Spatial Daylight Autonomy (SDA) and Annual Sunlight Exposure (ASE)

Two annual daylight performance metrics: spatial Daylight Autonomy (sDA) and Annual Sunlight Exposure (ASE). Both metrics are generated via a similar computer-based simulation methodology that uses a full year of hourly weather…

Mar 21, 2023 · 39 pages

ANSI/IES LP-3-20

Lighting Practice: Designing and Specifying Daylighting for Buildings

Daylighting refers to the art and practice of admitting beam sunlight, diffuse sky light, and reflected light from exterior surfaces into a building to provide ambient and/or task lighting to meet the…

Jun 30, 2020 · 162 pages

ANSI/IES RP-31-20

Recommended Practice: Economic Analysis of Lighting

Methods for gauging the profitability of a capital investment in a lighting system, which can be objectively compared to other competing capital investments.

Apr 20, 2020 · 43 pages

ANSI/IES RP-1-24

Recommended Practice: Lighting Office Spaces

Lighting for offices and related areas. The 2024 edition includes updates on visual glare mitigation, Visual Displays, Prediction/Assessment and High Dynamic Range Imaging, updated control systems used in offices, and acoustic luminaires…

Jun 5, 2025 · 81 pages

ANSI/IES RP-3-26

Recommended Practice: Lighting Educational Facilities

Jun 26, 2026 · 54 pages

ANSI/IES RP-4-26

Recommended Practice: Lighting Library Spaces

Jun 26, 2026 · 58 pages

ANSI/IES RP-29-25

Recommended Practice: Lighting Hospital and Healthcare Facilities

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…

Jan 13, 2026 · 162 pages

ANSI/IES RP-45-21

Recommended Practice: Horticultural Lighting

Differences between lighting for plants as opposed to lighting for humans. This document is intended for lighting professionals who are interested in horticultural lighting for greenhouses, indoor farms, and building atria.

Jun 28, 2021 · 67 pages

ANSI/IES RP-9-23

Recommended Practice: Lighting Hospitality Spaces

Design of lighting systems for hotel applications. The intent of this document is to address how all of the various components of hospitality lighting need to be an integrated system of layers…

Mar 21, 2023 · 76 pages

ANSI/IES RP-7-21

Recommended Practice: Lighting Industrial Facilities

Industrial facilities can at times be hazardous environments; special-case needs and considerations should be given in general for safety, general lighting, moving components, and supplemental, task, safety and emergency lighting. The primary…

Mar 5, 2020 · 121 pages

ANSI/IES LP-12-26

Lighting Practice: IoT Connected Lighting

Apr 13, 2026 · 59 pages

ANSI/IES RP-47-23

Recommended Practice: Landscape Lighting

Planning and implementation of landscape lighting designs, including safety and security issues, creating a more comfortable and navigable environment in order to work with nature’s intrinsic darkness as an element to be…

Dec 4, 2023 · 77 pages

ANSI/IES LP-1-24

Lighting Practice: Designing Quality Lighting for People and Buildings

Quality lighting design distinguishes the designer, provides full value to the client, and supports the design intent. This document will introduce the reader to the principles and background involved in achieving this…

May 14, 2025 · 177 pages

ANSI/IES RP-10-20

Recommended Practice: Lighting Common Applications

Lighting design considerations and illuminance criteria for common areas, which should influence luminaire optical selections, light source choices, and final layouts.

Mar 17, 2020 · 38 pages

ANSI/IES RP-46-25

Recommended Practice: Supporting the Physiological and Behavioral Effects of Lighting in Interior Daytime Environments

This Recommended Practice (RP) is the implementation companion to IES TM-18-18 Light and Human Health: An Overview of the Impact of Optical Radiation on Visual,Circadian, Neuroendocrine, and Neurobehavioral Responses in that it…

Dec 19, 2025 · 66 pages

IES TM-18-18

Light and Human Health: An Overview of the Impact of Optical Radiation on Visual, Circadian, Neuroendocrine, and Neurobehavioral Responses

The retinal mechanisms involved when light signals are converted into neural signals for vision and for other body functions. Light reaching the retina not only impacts on how humans see the world,…

Apr 4, 2018 · 41 pages

ANSI/IES LP-4-20(R2026)

Lighting Practice: Electric Light Sources - Properties,Selection, and Specification

Aug 3, 2026 · 98 pages

ANSI/IES LP-8-20

Lighting Practice: The Commissioning Process Applied to Lighting and Control Systems

This LP includes requirements for lighting and control systems to fully support the documentation, verification, and acceptance activities during each phase of the Commissioning Process, including a Systems Manual and training for…

Apr 22, 2020 · 55 pages

ANSI/IES LP-6-25

Lighting Practice: Lighting Control Systems - Properties, Selection, and Specification

This Lighting Practice document is intended to help designers, users, commissioning providers, and other interested parties understand fundamental characteristics and purposes of lighting control systems. This includes design considerations, energy-saving strategies, equipment,…

Dec 19, 2025 · 135 pages

ANSI/IES LP-16-22

Lighting Practice: Documenting Control Intent Narratives and Sequences of Operations

This document provides guidance on the documentationof Control Intent Narratives and Sequences of Operation(CIN and SOO). It is not intended to be a design guide,but rather a reference manual of best practices…

May 31, 2022 · 91 pages

ANSI/IES RP-42-26

Recommended Practice: Dimming and Control Method Designations

Standard designations for open non-proprietary dimming and control methods and protocols for luminaires (including standalone lamps) and controllers.

May 27, 2026 · 23 pages

ANSI/IES RP-28-25

Recommended Practice: Lighting and the Visual Environment for Older Adults and the Visually Impaired

This document is intended to increase the designers’ understanding of age-related vision loss and the importance of their design decisions that could affect the safety and independence of this growing sector of…

Feb 2, 2026 · 118 pages

ANSI/IES/AVIXA RP-38-17(R2022)

Recommended Practice: Lighting Performance for Small to Medium Sized Videoconferencing Rooms

IES/AVIXA recommendations for lighting small-to-medium-sized videoconferencing rooms that will enhance the comfort of participants and the picture quality delivered.

Nov 17, 2022 · 40 pages

ANSI/IES LP-9-25

Lighting Practice: Upgrading Lighting Systems in Nonresidential Spaces

General methods of performing a successful lighting upgrade. The 2025 update brings the content up to date regarding LEDs, controls, economic and maintenance factors, not only reducing operating costs but improving the…

Jan 13, 2026 · 81 pages

ANSI/IES/NALMCO RP-36-24

Recommended Practice: Lighting Maintenance

Design lighting systems that will be easy to maintain and will optimize energy efficiency and maintenance based on good maintenance practices and careful product selection.

Sep 9, 2024 · 65 pages

ANSI/IES TM-34-19

This document establishes consistent methods for specification of criteria, precision of calculations, and comparisons of calculations to criteria. It covers implicit and explicit statements of precision, as well as the subjects of…

Feb 28, 2019 · 15 pages

ANSI/IES RP-30-25

Recommended Practice: Lighting Museums

Effective exhibit and museum lighting, balancing exhibition presentation goals (enrich the visitor experience) with conservation techniques (intended to protect artifacts for appreciation by many generations to come.) The 2025 revision has new…

Jun 5, 2025 · 143 pages

ANSI/IES LS-1-25

Lighting Science: Nomenclature and Definitions for Illuminating Engineering

Dec 17, 2025 · 197 pages

ANSI/IES LS-2-20(R2023)

Lighting Science: Concepts and Language of Lighting

Describe, specify, and evaluate luminous environments. The concepts included result from a consideration of the nature of light, vision, and architecture. The vocabulary results from the need for clarity, specificity, and precision.

Jan 21, 2024 · 28 pages

ANSI/IES RP-39-19

Lighting should maintain the minimum luminance required for visibility and be extinguished when no longer needed, to minimize the negative impact of glare, light trespass, sky glow, animal attraction, and driver distraction.…

Apr 9, 2019 · 19 pages

ANSI/IES RP-43-25

Recommended Practice: Lighting Exterior Applications

Pedestrian-oriented illumination recommendations for the reassurance, safety, comfort, amenity, and enjoyment of people in outdoor environments in lighting zones LZ-1 through LZ-4. This updated standard includes content from LP-2 Designing Quality Lighting…

Dec 19, 2025 · 99 pages

ANSI/IES RP-27-26

Recommended Practice: Photobiological Safety for Lighting Systems

Apr 13, 2026 · 75 pages

ANSI/IES RP-27.1-22

Recommended Practice: Risk Group Classification and Minimization of Photobiological Hazards from Ultraviolet Lamps and Lamp Systems

This document provides risk group classification for all ultraviolet lamp systems, and the measurement conditions for different applications, thus superseding the more general risk group classifications used in ANSI/IES RP-27-20 for UV…

Nov 17, 2022 · 55 pages

ANSI/IES RP-44-21

Recommended Practice: Ultraviolet Germicidal Irradiation (UVGI)

Use of germicidal ultraviolet radiation for disinfection of room air and surfaces; potential dangers for humans; potential effects on materials and plants; UVGI technologies; and safety measures and precautions.

Jun 1, 2021 · 55 pages

ANSI/IES RP-40-19(R24)

Recommended Practice: Lighting Port Terminals

Recommendations for the illumination of a cargo handling terminal from a permanently installed lighting system.

Nov 28, 2024 · 31 pages

ANSI/IES/ALA RP-11-26

Recommended Practice: Lighting for Interior and Exterior Residential Environments

Lighting design objectives, criteria for quantity and quality of illuminance, lighting methods, types and uses of equipment, energy use, and electrical code considerations for residential lighting. Various solutions that address residential lighting…

Feb 18, 2026 · 128 pages

ANSI/IES LP-13-21

Lighting Practice: Introduction to Resilient Lighting Systems

Resilient design for lighting systems can support the goals of enhancing the resilience of buildings. The intent is to provide guidance on lighting performance, controls, and the characteristics of lighting equipment for…

Aug 8, 2021 · 27 pages

ANSI/IES RP-2-20

Recommended Practice: Lighting Retail Spaces

This document emphasizes lighting quality and energy efficiency and provides an in-depth discussion of the system and the criteria essential to lighting merchandise displays in a variety of retail applications.

Jul 23, 2020 · 104 pages

ANSI/IES RP-8-25+E2

Recommended Practice: Lighting Roadway and Parking Facilities

This Recommended Practice is a compilation of lighting design techniques and criteria, all offered for quality roadway lighting solutions. This update has updates for LLF, luminance vs. illuminance, calculation precision, obtrusive light…

May 14, 2025 · 579 pages

IES G-1-22

Guide for Security Lighting for People, Property, and Critical Infrastructure

Security lighting considerations include basic security principles; crime prevention concepts; light level criteria for a variety of applications; a protocol for evaluating current lighting levels; a security survey and crime search methodology;…

Nov 17, 2022 · 83 pages

ANSI/IES TM-37-22

Technical Memorandum: Description, Measurement, and Estimation of Sky Glow

Causes, characteristics, and potential impacts of human-based sky glow. This document provides the current state of the science for conducting estimations to facilitate its quantification and control.

Feb 21, 2022 · 55 pages

ANSI/IES LM-88-18(R2023)

Approved Method: Optical and Electrical Measurements of Ac-Led Packages and Arrays or Modules

Procedures to be followed and precautions to be observed in performing optical and electrical measurements of AC-LEDs for total luminous flux, total radiant flux, total photon flux, color characteristics, electrical voltage, current,…

Jul 18, 2023 · 23 pages

ANSI/IES RP-6-24

Recommended Practice: Lighting Sports and Recreational Areas

Lighting for all classes sports facilities except professional. Changes include adding the IES-DSI Five Principles for Outdoor Lighting, updates on color temperature recommendations, special event lighting, stairway & aisle lighting guidance, removal…

Mar 18, 2025 · 116 pages

ANSI/IES TM-25-20(R25)

Technical Memorandum: Ray File Format for Description of the Emission Properties of Light Sources

Standard ray file format to describe the emission properties of light sources. The ray file format contains information necessary to interface between ray tracing or other optical design, simulation, analysis and metrology…

Aug 14, 2025 · 45 pages

ANSI/IES LP-10-26

Lighting Practice: Lighting for Sustainability

Apr 13, 2026 · 84 pages

ANSI/IES LM-9-20(R2023)

Approved Method: Electrical and Photometric Measurement of Fluorescent Lamps

Procedures to be followed and the precautions to be observed in order to obtain uniform and reproducible measurements of the electrical and photometric characteristics of fluorescent lamps under standard conditions in 60…

Jun 27, 2023 · 25 pages

ANSI/IES LM-10-20(R2023)

Approved Method: Photometric Testing of Roadway and Area Lighting Fluorescent Luminaires

Jun 27, 2023 · 51 pages

ANSI/IES LM-11-20(R2023)

Approved Method: Photometric Testing of Searchlights Using Incandescent or HID Sources

Jun 27, 2023 · 31 pages

ANSI/IES LM-20-20

Approved Method: Photometry of Reflector Type Lamps

Apr 22, 2020 · 27 pages

ANSI/IES LM-28-20

Approved Method: Guide for the Selection, Care, and Use of Electrical Instruments in the Photometric Laboratory

Apr 22, 2020 · 27 pages

ANSI/IES LM-31-20(R2023)

Approved Method: Photometric Testing of Roadway and Area Lighting Luminaires Using Incandescent Filament or High Intensity Discharge Lamps

Jun 27, 2023 · 47 pages

ANSI/IES LM-35-20(R2023)

Approved Method: Photometric Testing of Floodlights Using High Intensity Discharge or Incandescent Filament Lamps

Jun 27, 2023 · 37 pages

ANSI/IES LM-37-20

Approved Method: Determination of Average Luminance (Calculated) for Indoor Luminaires

Apr 22, 2020 · 31 pages

ANSI/IES LM-40-20(R2023)

Approved Method: Life Testing of Fluorescent Lamps

Jun 27, 2023 · 19 pages

ANSI/IES LM-41-20(R2023)

Approved Method: Photometric Testing of Indoor Fluorescent Luminaires

Jun 27, 2023 · 28 pages

ANSI/IES LM-45-20(R2023)

Approved Method: Electrical and Photometric Measurement of General Service Incandescent Filament Lamps

Jun 27, 2023 · 18 pages

ANSI/IES LM-46-20(R2023)

Approved Method: Photometric Testing of Indoor Luminaires Using High Intensity Discharge or Incandescent Filament Lamps

Jul 18, 2023 · 27 pages

ANSI/IES LM-47-20(R2023)

Approved Method: Life Testing of High Intensity Discharge (HID) Lamps

Jul 18, 2023 · 15 pages

ANSI/IES LM-48-20

Approved Method: Testing the Calibration of Locking-Type Photoelectric Control Devices Used in Outdoor Applications

Mar 19, 2020 · 23 pages

ANSI/IES LM-49-20(R2023)

Approved Method: Life Testing of Incandescent Filament Lamps

Jul 18, 2023 · 16 pages

ANSI/IES LM-51-20(R2023)

Approved Method: Electrical and Photometric Measurement of High Intensity Discharge Lamps

Jul 18, 2023 · 17 pages

ANSI/IES LM-54-20

Approved Method: IES Guide to Lamp Seasoning

Feb 7, 2020 · 19 pages

ANSI/IES LM-58-20

Approved Method: Spectroradiometric Measurement Methods for Light Sources

Feb 7, 2020 · 30 pages

ANSI/IES LM-61-20(R2023)

Approved Method: Identifying Operating Factors for Installed High Intensity Discharge Luminaires

Jul 18, 2023 · 23 pages

ANSI/IES LM-62-20(R2023)

Approved Method: Laboratory or Field Thermal Measurements of Fluorescent Lamps and Ballasts in Luminaires

Jul 18, 2023 · 14 pages

ANSI/IES LM-65-20(R2023)

Approved Method: Life Testing of Single-Based Fluorescent Lamps

Jul 18, 2023 · 14 pages

ANSI/IES LM-66-20(R2023)

Approved Method: Electrical and Photometric Measurements of Single-Based Fluorescent Lamps

Jul 18, 2023 · 20 pages

ANSI/IES LM-72-20

Approved Method: Directional Positioning of Photometric Data

May 27, 2020 · 23 pages

ANSI/IES LM-73-04(R18)

Approved Method: For Photometric Testing of Entertainment Lighting Luminaires Using Incandescent Filament Lamps or High Intensity Discharge Lamps

Jul 18, 2023 · 23 pages

LM-75-19

Nov 22, 2019 · 39 pages

ANSI/IES LM-77-20

Approved Method: Intensity Distribution Measurement of Luminaires and Lamps Using Digital Screen Imaging Photometry

Feb 7, 2020 · 47 pages

ANSI/IES LM-78-20

Approved Method: Total Luminous Flux Measurement of Lamps Using an Integrating Sphere Photometer

Feb 7, 2020 · 35 pages

ANSI/IES LM-79-24

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

Dec 12, 2024 · 32 pages

ANSI/IES LM-80-21

Approved Method: Measuring Maintenance of Light Output Characteristics of Solid-State Light Sources

Aug 6, 2021 · 27 pages

ANSI/IES LM-81-20(R2023)

Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices Under Hemispherical Sky Conditions

Jul 18, 2023 · 26 pages

ANSI/IES LM-82-20

Approved Method: Characterization of Optical and Electrical Properties of Solid-State Lighting Products as a Function of Temperature

Oct 11, 2019 · 23 pages

ANSI/IES LM-84-20

Approved Method: Measuring Optical Radiation Maintenance of LED Lamps, Light Engines, and Luminaires

Feb 7, 2020 · 22 pages

ANSI/IES LM-85-23

Approved Method: Optical and Electrical Measurements of LED Sources

Sep 25, 2023 · 48 pages

ANSI/IES LM-86-20(R2023)

Approved Method: Measuring Luminous Flux and Color Maintenance of Remote Phosphor Components

The first standard to address remote phosphor technologies. This Lighting Measurement (LM) document addresses the test method for measuring degradation behavior of the remote phosphor component, as well as an alternative method,…

Nov 29, 2023 · 19 pages

ANSI/IES LM-90-20

Approved Method: Measuring Luminous Flux Waveforms for Use in Temporal Light Artifact (TLA) Calculations

Measurement, equipment requirements, and formulation of luminous flux waveforms for use in the calculations of temporal light artifact (TLA) under standard conditions from light sources.

Jun 18, 2020 · 39 pages

ANSI/IES LM-91-22

Approved Method: Application Distance Radiometry

Measuring illuminance, irradiance, and/or photon flux density at multiple points on a plane at a specific application distance.

Dec 2, 2021 · 51 pages

ANSI/IES/IUVA LM-92-22

Approved Method: Optical and Electrical Measurement of Ultraviolet LEDS

Procedures to be followed and precautions to be observed in performing measurements of total radiant flux (total radiant power), electrical power, and wavelength characteristics of ultraviolet (UV) light emitting diodes (LEDs). This…

Mar 1, 2022 · 34 pages

ANSI/IES/IUVA LM-93-22

Approved Method: Optical and Electrical Measurements of Far Uv-C Excimer Sources

Procedures to be followed and precautions to be observed in performing measurements of total radiant flux (total radiant power), electrical power, and wavelength characteristics of ultraviolet (UV) light emitting diodes (LEDs). This…

Nov 17, 2022 · 27 pages

ANSI/IES LM-98-24

Approved Method: Measuring In-Situ Temperature of Solid-State Lighting Components in Lamps and Luminaires

Procedures to be followed and precautions to be observed in performing measurements of total radiant flux (total radiant power), electrical power, and wavelength characteristics of ultraviolet (UV) light emitting diodes (LEDs). This…

May 8, 2024 · 23 pages

ANSI/IES LS-3-20(R2023)

Lighting Science: Physics and Optics of Radiant Energy

This document describes the physics of radiant energy for various light source types, as well as the physical optics used for manipulating light.

Jul 18, 2023 · 40 pages

ANSI/IES LS-4-20(R23)

Lighting Science: Measurement of Light - The Science of Photometry

Jul 18, 2023 · 41 pages

ANSI/IES TM-15-20

Technical Memorandum: Luminaire Classification System for Outdoor Luminaires

IES classification system for outdoor luminaires.

May 21, 2020 · 23 pages

ANSI/IES TM-21-21

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

IES-approved recommendations for projecting flux maintenance of LED light sources using data obtained when testing them per ANSI/IES LM-80.

Aug 6, 2021 · 55 pages

ANSI/IES TM-26-20(R2023)

Approved Method: Projecting Catastrophic Failure of LED Packages

IES-approved recommendations for projecting flux maintenance of LED light sources using data obtained when testing them per ANSI/IES LM-80.

Jul 18, 2023 · 17 pages

ANSI/IES TM-28-20

Approved Method: Projecting Long-Term Luminous Flux Maintenance of LED Lamps and Luminaires

Sampling, test intervals and duration, and a method for long term luminous flux maintenance projection for LED lamps and luminaires. The intent is to help product manufacturers and users, standards developing bodies,…

Apr 23, 2020 · 31 pages

ANSI/IES TM-31-20

Technical Memorandum: Measurement Uncertainty for Lighting Equipment Calibration Using Integrating Spheres

A common approach to the uncertainty analysis for calibration of lumen measuring equipment (integrating spheres) with standard incandescent lamps, including halogen, that have been assigned values of total luminous flux and/or total…

Feb 25, 2020 · 83 pages

ANSI/IES TM-35-19(R25)

Technical Memorandum: Projecting Long-Term Chromaticity Coordinate Shift of LED Packages, Arrays, and Modules

IES-approved recommendations for projecting long-term chromaticity coordinate stability of LED light sources using data obtained per ANSI/IES LM-80-15, Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays, and Modules.

Aug 14, 2025 · 57 pages

ANSI/IES TM-38-21

Technical Memorandum: Photometric and Electrical Measurements of Tunable-White Solid-State Lighting Products

Protocol for measuring photometric, colorimetric, and electrical characteristics of tunable-white solid-state lighting products - including lamps, luminaires, and light engines - as covered by ANSI/IES LM-79-19. This protocol applies to products for…

Aug 8, 2021 · 23 pages

ANSI/IES LS-7-20

Lighting Science: Vision - Eye and Brain

The purpose of this document is to describe and explain the human visual system, including its components in the eye and the brain. The structure and function of these various components are…

Apr 22, 2020 · 39 pages

ANSI/IES LS-8-25

Lighting Science: Vision - Perception and Performance

This document provides an overview of visual perceptions and performance, covering topics such as brightness, glare, flicker, visibility, and illuminance criteria; as well as basic descriptions and background of visual phenomena in…

Feb 2, 2026 · 59 pages

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

Fundamentals of visual efficiency, defines the EVE calculation method, and addresses practical concerns for implementation.

May 28, 2020 · 31 pages

ANSI/IES TM-39-25

Technical Memorandum: Quantification and Specification of Visual Responses to Temporal Light Modulation (a.K.a. Flicker)

Flicker, a common name for light that fluctuates rapidly in luminance over time, has been a concern since the introduction of electrical lighting systems at the turn of the 20th century. The…

Apr 16, 2025 · 51 pages