Three Newly Published IES Standards

David Shiller October 1, 2026

Here are three newly published IES standards:

ANSI/IES RP-27-26 Recommended Practice: Photobiological Safety for Lighting Systems

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.

ANSI/IES LP-10-26 Lighting Practice: Sustainable Lighting

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.

ANSI/IES RP-3-26 Recommended Practice: Lighting Education Facilities

The 2026 revision includes updates and additions for Daylighting, Controls, and new images. The changes harmonize this standard with ANSI/IES RP-1-24.

David Shiller

David Shiller is the Publisher of LightNOW, and Senior Business Development Consultant at Capacity Consulting, a North American consulting firm providing business development services to advanced lighting manufacturers. The ALA awarded David the Pillar of the Industry Award. David has been co-chair of the ALA’s Engineering Committee since 2010. David established MaxLite’s OEM component sales into a multi-million dollar division. He invented GU24 lamps while leading ENERGY STAR lighting programs for the US EPA. David has been published in leading lighting publications, including LD+A, enLIGHTenment Magazine, LEDs Magazine, and more.

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