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  • Search Measurement Standards

Found

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
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LM-81-10
01-Jan-2010
Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions

This guide provides the IES required uniform method for determining and reporting the photometric characteristics of skylights and tubular daylighting devices.  It describes the procedures followed and the precautions observed in obtaining uniform and reproducible measurements of tubular daylighting devices and skylights with glass or plastic glazing (not recommended for devices with clear glazing). This guide identifies the components and the structure type needed to adequately measure daylighting devices.  The procedures, calibration of the equipment, and determination of sun angles and sky conditions are also discussed.

Contents
 
Scope and Purpose
General Lighting Characteristics
Test Distance
Goniophotometer Basic Construction
Goniophotometer Structure
Calibration
Sky Conditions
Testing Procedures
Testing Procedure Steps
Limitation of Skylight Photometry

Annex A  Accuracy of the Quadrant Testing Method
Annex B  The Testing of Transparent Skylights
Annex C  Accuracy Analysis of Reflections from Black Card
Annex D  Calculation of Standard Tine for Different Solar Elevations
References

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