IES LM-84-14 PDF Download

The IES LM-84-14 standard describes the method for measuring luminous flux and color maintenance of LED lamps, light engines, and luminaires. It builds upon the previous standard, IES LM-80-08, which focused on measuring the performance of individual LED light sources. In this new standard, the evaluation of performance changes over time is extended to include other system components that contribute to luminous flux decay and color change.

The document emphasizes the importance of testing SSL systems at the product level, as the performance changes of the entire assembly can be directly evaluated. This allows for engineering evaluations and ensures luminous flux maintenance for the complete SSL system. The standard also acknowledges the influence of operational and environmental variables on the performance of SSL systems, such as operating cycle, ambient temperature, and airflow. To enable reliable comparisons and reproducible results, the test methodology establishes consistent and controlled environmental conditions across different laboratories.