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Details

LM-85-14
IES Approved Method for Electrical & Photometric Measurements of High Power LEDs
LM-9-09
Electrical and Photometric Measurements of Fluorescent Lamps
LM-46-04
Photometric Testing of Indoor Luminaires Using High Intensity Discharge or Incandescent Filament Lam
LM-52-03
Photometric Measurements of Roadway Sign Installations (Reaffirmed 2014)
LM-62-06
Laboratory or Field Thermal Measurements of Fluorescent Lamps and Ballasts in Luminaires, Reaffirmed
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-77-09
Intensity Distribution Measurement of Luminaires and Lamps Using Digital Screen Imaging Photometry
LM-81-10
Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions
LM-51-13
Electrical and Photometric Measurement of High Intensity Discharge Lamps
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-41-14
Approved Method for Photometric Testing Of Indoor Fluorescent Luminaires
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
LM-86-15
IES Approved Method: Measuring Luminous Flux and Color Maintenance of Remote Phosphor Components (LM
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LM-85-14
01-Jan-2014
IES Approved Method for Electrical & Photometric Measurements of High Power LEDs
This document describes the procedures to be followed and precautions to be observed in performing accurate measurements of total luminous flux, total radiant flux (optical power), total photon flux, electrical power, luminous efficacy, color quantities, and wavelength characteristics of high-power light emitting diodes (LEDs) including white LEDs as well as single color LEDs. This document covers LED packages (defined in ANSI/IES RP-16-10) including those with multiple chips and remote-phosphor LED packages. This document covers measurement under pulse operation as well as steady DC operation of LEDs, and in all cases, the thermal condition of LEDs refers to their junction temperature. The approved methods apply to laboratory measurements.
 
This document does not cover LED arrays or modules, nor LED lighting products; it does not cover AC driven LEDs, and does not apply to measurements in LED manufacturer’s production control nor relative measurements of LED thermal characteristics.
 
 
Contents
Scope
Normative References
Definitions
Preparation for Measurements
Methods of Measurement under Pulse-Mode Operation of DUT
Method of Measurement under DC-Mode Operation of DUT
Optical Measurement and Equipment
Electrical Measurement and Equipment
Test Report
References
Annex A Pulse-Mode and DC-Mode Methods for LED Operation
Annex B Estimation of Tj Rise and Correction
Annex C Caution for Optical Measurement Instruments for Pulse-Mode Methods
Annex D Integrating Sphere and Goniophotometer
Annex E Integrating Sphere Geometries and Calibration Methods
Annex F General Design of Integrating Spheres
Annex G Self-Absorption Correction
Annex H Calibration of Sphere-Spectroradiometer
Annex I Use of Spectroradiometer
Annex J Other Sources of Error
Annex K Sphere-Photometer System
Annex L Goniophotometric Method for Total Luminous Flux

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