ANSI/IES TM-30-24 Cover

Technical Memorandum: IES Method for Evaluating Light Source Color Rendition

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ANSI/IES TM-30-24
Document Type: Technical Memorandum (TM)

Available as a downloadable secure PDF only.
(includes the EXCEL calculation tool files)

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SKU: ANSI/IES TM-30-24 Category:

Product Description

Intended Audience: Lighting specifiers, manufacturers, engineers, designers, authors of regulations/ recommended practices.Approved American National StandardIntended Interest Categories: Specifier (US), Affected (UA), Public Interest (UP), Academic, Research (GAR), Government, Regulatory (GGR), General SME (GSME), Organizational (OM) Test Equip User (TEU), Test Equip Manf (TEM). Description: IES-approved method for evaluating light source color rendition that takes an objective and statistical approach, quantifying both overall average properties (color fidelity, gamut area) and hue-specific properties (fidelity, chroma shift, hue shift) of a light source using numerical and graphical techniques.

Page count: 54 pages
Publisher: Illuminating Engineering Society (2024)
SKU: ANSI/IES TM-30-24
ISBN-13: 978-0-87995-478-9

Chapters:

  • 1.0 Introduction and Scope
    2.0 Core Calculations
    3.0 Calculated Measures
    4.0 Commentary

CONTENTS

  • 1.0 Introduction
  • 1.1 Calculation Components
  • 1.2 Scope
  • 2.0 Core Calculations
  • 2.1 Colorimetric Observer
  • 2.2 Test Source
  • 2.3 Reference Illuminant
  • 2.4 Color Evaluation Samples (CES)
  • 2.5 Range and Interpolation of Data
  • 2.6 Calculation of Tristimulus Values
  • 2.7 Color Space and Chromatic Adaptation Transformation
  • 2.8 Color Difference Formula
  • 3.0 Calculated Measures
  • 3.1 Fidelity Index
  • 3.2 Sample Color Fidelity
  • 3.3 Hue-Angle Bins
  • 3.4 Gamut Index
  • 3.5 Color Vector Graphic
  • 3.6 Local Chroma Shift
  • 3.7 Local Hue Shift
  • 3.8 Local Color Fidelity
  • 3.9 Summary of Measures
  • 4.0 Commentary
  • 4.1 Average Valuesf)
  • 4.2 Color Rendition Preference and Other Perceptions
  • 4.3 Preferred Chromaticity
  • 4.4 Comparison Across CCTs
  • 4.5 Energy Efficiency
  • 4.6 Color Samples
  • 4.7 Fluorescence and Whiteness
  • 4.8 Calculation Precision and Rounding
  • Annex A – Color Evaluation Samples
  • Annex B – Color Specification For Hue-Angle Bin Graphics
  • Annex C – Background For Color Vector Graphic
  • Annex D – Color Rendition Report Templates
  • Annex E – Recommendations for Specifying Light Source Color Rendition
  • Annex F – Evidence Supporting Recommended Criteria for Specifying Light Source Color Rendition

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