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Approved Method: Electrical and Photometric Measurement of High Intensity Discharge Lamps

Electrical and Photometric Measurement of High Intensity Discharge Lamps

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ANSI/IES LM-51-20
Document Type: Lighting Measurement and Testing (LM)

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SKU: ANSI/IES LM-51-20 Category: Tag:

Product Description

Approved American National StandardThis document describes the procedures to be followed and the precautions to be observed in obtaining uniform and reproducible measurements of the electrical and photometric characteristics of high intensity discharge (HID) lamps under standard conditions in alternating current (AC) circuits at 60 Hz. The HID lamps covered by this document include the lamp groups commonly known as mercury vapor, metal halide, and high pressure sodium used in general lighting applications. The photometric information usually required is total luminous flux (lumens) and/or luminous intensity (candelas) in one or more directions, and color. The electrical characteristics usually measured are line voltage, lamp voltage, lamp current, and lamp power.

Page count: 8 pages
Publisher: Illuminating Engineering Society (2020)
SKU: ANSI/IES LM-51-20
ISBN-13: 978-0-87995-029-3

Chapters:

  • 1.0 Introduction and Scope
    2.0 Normative References
    3.0 Nomenclature and Definitions
    4.0 Physical and Environmental Test Conditions
    5.0 Electrical Test Conditions
    6.0 Lamp Test Procedures
    7.0 Photometric Test Procedures
    8.0 Test Report

 
Citation Format:
Illuminating Engineering Society. ANSI/IES LM-51-20, Approved Method: Electrical and Photometric Measurement of High Intensity Discharge Lamps. New York: IES; 2020.

CONTENTS

  • 1.0 Introduction and Scope
  • 1.1 Introduction
  • 1.2 Scope
  • 2.0 Normative References
  • 2.1 ANSI/IES LS-1-20
  • 2.2 ANSI/IES LM-75-19
  • 2.3 ANSI/IES LM-78-20
  • 3.0 Nomenclature and Definitions
  • 3.1 auxiliary equipment
  • 3.2 seasoning
  • 4.0 Physical and Environmental Test Conditions
  • 4.1 General
  • 4.2 Temperature
  • 4.3 Airflow
  • 4.4 Vibration
  • 5.0 Electrical Test Conditions
  • 5.1 Line Voltage Waveform
  • 5.2 Voltage or Current Regulation
  • 5.3 Power Source Impedance
  • 5.4 Ballast
  • 5.5 Circuits
  • 6.0 Lamp Test Procedures
  • 6.1 Lamp Orientation
  • 6.2 Lamp Stabilization
    6.2.1 Seasoning
    6.2.2 Pre-burning
  • 6.3 Electrical Settings
  • 6.4 Electrical Instrumentation
    6.4.1 Instrument Tolerance
    6.4.2 Impedance Limitations
  • 7.0 Photometric Test Procedures
  • 7.1 Total Luminous Flux Measurements with an Integrating Sphere
    7.1.1 Photodetector
    7.1.2 Spectroradiometer
  • 7.2 Measuring Luminous Intensity (Candelas)
  • 7.3 Luminous Intensity Distribution
    7.3.1 Intensity Distribution Calculation
    7.3.2 Photometer Head (Photodetector)
    7.3.3 Spectroradiometer
  • 7.4 Color Measurements
  • 8.0 Test Report
  • Annex A – Measurement Errors Due to the Deviation in System Response from V(λ)
  • Informative References