Lighting practitioners have found it difficult to obtain accurate optical and electrical characteristics of AC-LEDs at realistic elevated-temperature operating conditions. This document describes the procedures to be followed and precautions to be observed in performing optical and electrical measurements of AC-LEDs for total luminous flux, total radiant flux, total photon flux, color characteristics, electrical voltage, current, and power. This Approved Method applies to AC-LED packages, remote-phosphor AC-LED packages, AC-LED arrays or modules, and remote-phosphor AC-LED arrays or modules. This document specifies measurement methods under single-cycle AC operation as well as continuous AC operation with an AC frequency of 50 Hz or 60 Hz.
Page count: 12 pages
Publisher: Illuminating Engineering Society (2018)
SKU: ANSI/IES LM-88-18
1.0 Introduction and Scope
2.0 Normative References
4.0 Optical Measurement Instruments
5.0 Electrical Measurement Instruments
6.0 Preparation for Measurements
7.0 Method of Measurement under Single-Cycle AC Operation
8.0 Method of Measurement under Continuous AC Operation
9.0 Optical Measurements
10.0 Test Report
Illuminating Engineering Society. ANSI/IES LM-88-18, Approved Method: Optical and Electrical Measurements of AC-LED Packages and Arrays or Modules. New York: IES; 2018.