本批准方法描述了固态光源，如LED封装、阵列和模块；或者，可以对激光二极管封装、阵列和模块进行长期通量维护测试，包括光通量、辐射通量和光子通量维护。本文件还提供了光谱相关特性维护的测量方法，包括在受控环境和操作条件下进行时，色度坐标、峰值波长、优势波长、质心波长和光谱功率分布随时间的变化。就本文件而言，solid- 国家光源包括紫外线、可见光和红外光源，其光辐射范围为200 nm至2000 nm。本批准方法不适用于灯具、光机或灯具，也不提供有关实际测量持续时间以外的维护特性预测估计或外推的指导。

This Approved Method describes the procedures by which solid-state light sources, such as LED packages, arrays and modules; or laser diode packages, arrays and modules may be tested for flux maintenance over time, including luminous flux, radiant flux, and photon flux maintenance. This document also provides methods for measurement of spectrum-dependent characteristic maintenance, including changes in chromaticity coordinates, peak wavelength, dominantwavelength, centroid wavelength, and spectral power distribution over time, when carried out under controlled environmental and operational conditions. For the purposes of this document, solid-state light sources include ultraviolet, visible, and infrared sources emitting optical radiation in the range of 200 nm to 2,000 nm.This Approved Method does not cover lamps, light engines, or luminaires and does not provide guidance regarding predictive estimations or extrapolation for the maintenance characteristics beyond the duration of the actual measurements.