Here are three newly published IES standards:
Normative & informative references added, change to the 500-lux distance calculation, UV radiation Risk Group duration, NEI setting, optical system notes, average of subtended angles, changes to the lumen-to-radiant power conversion, revisions to Table A-2 Spectral Weighting Function, equations for retinal blue light hazard exposure limit.
The 2026 version is a complete re-organization of ANSI/IES LP-10, focusing on best practices, in four main areas: Sustainable Lighting Design, life cycle analysis, material health, and rating systems, product labelling/declarations, corporate programs, social & environmental justice. A new section is added for Takeaways and Checklists to aid the designer, definitions have been updated.
The 2026 revision includes updates and additions for Daylighting, Controls, and new images. The changes harmonize this standard with ANSI/IES RP-1-24.
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