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  • Search Measurement Standards

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Details

LM-81-10
Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions
LM-40-10
Life Testing of Fluorescent Lamps
LM-47-12
IES Approved Method For Life Testing of High Intensity Discharge (HID) Lamps
LM-49-12
Life Testing of Incandescent Filament Lamps
LM-51-13
Electrical and Photometric Measurement of High Intensity Discharge Lamps
LM-58-13
IES Approved Method for Spectroradiometric Measurement Methods for Light Sources
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-66-14
Electrical and Photometric Measurements of Single-Based Fluorescent Lamps
LM-65-14
IES Approved Method for Life Testing of Single-Based Fluorescent 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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TI-IND-MAT-6-3