The IES is publishing nine new or revised standards in Q1 2026:
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 and LP-11 Environmental Outdoor Lighting, for one comprehensive standard for exterior lighting. New content will include re-defined Lighting Zones, color, controls and glare metrics.
ANSI/IES RP-28 Recommended Practice: Lighting and the Visual Environment for Older Adults and the Visually Impaired
Older adults represent the fastest growing segment of the population, with over 49 million Americans over 65. With over 10,000 Baby Boomers turning 65 everyday, this document revises the 2020 version. The over-40 population represents approximately 89 million people; of those, 63 percent have vision problems. However, there is a prevalence of low vision in the general senior population, which increases dramatically after the age of 70. Low vision is defined as vision impairment that is worse than 20/60 in the better eye and which cannot be correctable medically, surgically, or with conventional eyeglasses. People rely on a supportive visual environment to maximize their independence and safety. The guidance provided in this document is intended to serve a wide range of users, including individuals, design professionals, owners and managers of commercial buildings, code and regulatory agencies, and legislative bodies.
ANSI/IES RP-29-25 Recommended Practice: Lighting Hospital and Healthcare Facilities
This document provides context, defines challenges, and identifies 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.
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, and the variety of organizing protocols and methods in common usage.
The 2025 update is a complete re-organization of the standard, including a more holistic view of how and why lighting controls provide a more highly functioning building and user experience. ANSI/IES LP-6-25 introduces important concepts from ANSI/IES LP-16-22 Lighting Practice: Documenting Control Narratives and Sequences of Operations, as well as ANSI/IES LP-8-20 Lighting Practice: The Commissioning Process Applied to Lighting and Control Systems. The update represents the definitive equivalent of a Lighting Controls Handbook in the breadth and scope. This updated standard is completely refreshed with new content, including cybersecurity & controls, identification of “NEBs” (non-energy benefits), such as Spectral tunability, quality considerations, wellness/optimal circadian effects, preservation of design integrity, optimized space zoning, effective lighting equipment maintenance, demand response, reduced light pollution, receptacle control and asset tracking.
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 working environment for occupants, improving productivity and effectiveness.
BSR/IES RP-27 Recommended Practice: Photobiological Safety for Lighting Systems
This document provides risk group classification for all ultraviolet lamp systems, and the measurement conditions for different applications. It includes manufacturing and user safety requirements that may be required as a result of an ultraviolet lamp system being assigned to a particular risk group. The assigned risk group of an ultraviolet lamp system also may be used to assist with any needed risk assessments, e.g., for occupational exposure in workplaces.
BSR/IES LP-30 Lighting Practice: A Comprehensive Guide to Specifying Color Rendition – Concepts, Criteria, and Implementation
LP-30 provides guidance on the use of ANSI/IES TM-30-24 Technical Memorandum: IES Method for Evaluating Light Source Color Rendition. Annex E within TM-30 also provides recommendations for specifying light source color rendition and assists in selecting light sources that meet color rendering requirements. LP-30 will be written for specifiers on how to best progress through each step of the color rendering design process to achieve the most desirable results.
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 provides recommendations for translation of the basic science of how light affects visual, circadian, neuroendocrine, and neurobehavioral responses in daytime interior environments, such as those found in schools and offices. This update incorporates Melanopic EDI Exposure Recommendations, as well as some Errata & Addenda content.
ANSI/IES LS-6-20(R25) Lighting Science: Calculation of Light and Its Effects
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 explained, as well as the ways in which individual people differ in their visual abilities.
More information on individual IES standards can be found here.
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