Technical Memorandum: Projecting Long-Term Chromaticity Coordinate Shift of LED Packages, Arrays, and Modules
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ANSI/IES TM-35-19(R25)
Document Type: Technical Memorandum (TM)
Available as a downloadable secure PDF only.
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Product Description
Intended Audience: Testing laboratories, energy efficiency organizations and regulators, manufacturers of lighting products, lighitng specifiers.
Intended Interest Categories: Specifier (US), Affected (UA), Public Interest (UP), Academic, Research (GAR), Government, Regulatory (GGR), General SME (GSME), Organizational (OM), Testing Equipment Users (TEU), Testing Equipment Manufacturers (TEM).
Description: 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.
Page count: 57 pages
Publisher: Illuminating Engineering Society (2025)
SKU: ANSI/IES TM-35-19(R25)
ISBN-13: 978-0-87995-538-0
Chapters:
- 1.0 Introduction and Scope
2.0 Normative References
3.0 Definitions
4.0 Test Data and Sample Size
5.0 Chromaticity Coordinate Shift Projection
6.0 Temperature and Current Interpolation
7.0 Report - Annex A – Comments on Color Maintenance Behavior
- Annex B – Types of Chromaticity Shift Behavior
- Annex C – Mathematical Model Development
- Annex D – Calculation Examples
- Annex E – Extrapolation Methods
Citation Format:
Illuminating Engineering Society. ANSI/IES TM-35-19(R25), Technical Memorandum: Projecting Long-Term Chromaticity Coordinate Shift of LED Packages, Arrays, and Modules. New York: IES; 2025.