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  • Search Measurement Standards

Found

Details

LM-85-14
IES Approved Method for Electrical & Photometric Measurements of High Power LEDs
LM-52-03
Photometric Measurements of Roadway Sign Installations (Reaffirmed 2014)
LM-76-02
Photometric Testing of Fiber Optics Lighting Systems (Reaffirmed 2008)
LM-78-07
Approved Method for Total Luminous Flux Measurement of Lamps Using an Integrating Sphere Photometer
LM-79-08
Approved Method: Electrical and Photometric Measurements of Solid-State Lighting Products
LM-77-09
Intensity Distribution Measurement of Luminaires and Lamps Using Digital Screen Imaging Photometry
LM-50-13
IES Approved Method for Photometric Measurement of Roadway and Street Lighting Installations
LM-84-14
IES Approved Method for Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, a
LM-71-14
IES Approved Guide: Photometric Measurement of Tunnel Lighting Installations
LM-80-15
IES Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays and Modul
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LM-80-15
01-Jan-2015
IES Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays and Modul

Print version available end of August 

This document describes the procedures by which LEDs are tested for the luminous (or radiant, or photon) flux maintenance and chromaticity maintenance or wavelength changes over time when operated under controlled environmental and operational conditions. The resulting measurements may be used for comparison of LEDs, and they may be utilized in models that project long-term changes in light output during the life of the LEDs.

The scope within this ANSI/IES LM-80-15 has been expanded to include tests for three types of flux maintenance along with tests for how chromaticity changes over time. LED drive characteristics have been updated to include pulse width modulated current, DC constant voltage and AC regulated voltage drive. The maintenance test duration and measurement interval are no longer specified but rather left for determination according to the intended usage of the data. The reporting section is more specific with regard to the required data. Requirements for thermal measurements have been clarified to reflect industry best practices.

Contents

Scope

Normative References

Definitions

Physical and Environmental Conditions

Electrical Conditions

Photometric and Electrical Measurement Procedures

Maintenance Test Procedures

Test Report

Annex A DUT Sample Selection (Informative)

Annex B Monitoring of Case Temperatures (Normative)

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