Approved Method: Identifying Operating Factors for Installed High Intensity Discharge Luminaires

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ANSI/IES LM-61-20(R2023)
Document Type: Lighting Measurement and Testing (LM)

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SKU: ANSI/IES LM-61-20(R2023) Category:

Product Description

Approved American National StandardMeasuring luminaires in the field varies greatly from the control of testing in a laboratory. In this guide, you’ll learn more about the factors that can cause differences between calculated and measured illuminance and luminance values of outdoor high intensity discharge (HID) and low pressure sodium (LPS) lamps and luminaires.

Page count: 14 pages
Publisher: Illuminating Engineering Society (2023)
SKU: ANSI/IES LM-61-20(R2023)
ISBN-13: 978-0-87995-212-9

Chapters:

  • 1.0 Introduction and Scope
    2.0 Variables
    3.0 General Considerations
    4.0 Additional Reading

Citation Format:
Illuminating Engineering Society. ANSI/IES LM-61-20(R2023), Approved Method: Identifying Operating Factors for Installed High Intensity Discharge Luminaires. New York: IES; 2023.

CONTENTS

  • 1.0 Introduction and Scope
    • 1.1 Introduction
    • 1.2 Scope
  • 2.0 Variables
    • 2.1 Power Supply and Ballast Variations
    • 2.1.1 Power Supply Voltage
    • 2.1.2 Distribution System Impedance
    • 2.1.3 Wave Shape of Voltage and Current
    • 2.1.4 Ballasts
    • 2.2 Lamp Variations
    • 2.2.1 Light Output of the Lamp
    • 2.2.2 Arc Tube Alignment
    • 2.2.3 Arc Tube Temperature
    • 2.2.4 Position Factor
    • 2.2.5 Special Purpose Lamps
    • 2.3 Luminaire Optical Variations
    • 2.3.1 Reflector Materials
    • 2.3.2 Reflector Shape
    • 2.3.3 Refractors and Enclosures
    • 2.3.4 Luminaire Assembly Tolerances
    • 2.3.5 Luminaire Configurations and Options
    • 2.4 Field Conditions
    • 2.4.1 Mounting Height
    • 2.4.2 Spacing
    • 2.4.3 Aiming and Tilt
    • 2.4.4 Topography and Obstructions
    • 2.4.5 Surface Properties
    • 2.5 Field Measurements
    • 2.5.1 Meter Accuracy
    • 2.5.2 Contaminant Conditions
    • 2.5.3 Light Meter Positioning
    • 2.5.4 Measurement Grid and Registration
    • 2.5.5 Humidity and Temperature
    • 2.5.6 Atmospheric Transmissivity
    • 2.5.7 Weather and Site Conditions
  • 3.0 General Considerations
  • 4.0 Additional Reading