To design the flux maintenance of LED light sources using the data obtained during testing in the ANSI/IES TM-21-19 standard, developed by the American National Standards Institute (ANSI) and the Lighting Engineering Society (IES), within the framework of the ANSI/IES LM-80-15 standard. recommendations are offered. This method is not used to project less than 70 percent lumen, photon, or radiant flux maintenance. The ANSI/IES LM-80-15 standard contains an approved method for measuring the luminous flux and color maintenance of LED packages, arrays, and modules.
One of the benefits of LED light sources is their very long lifespan. Unlike other lighting technologies, LEDs typically do not fail easily during use. However, their light output gradually degrades over time. At some point, the light emitted by an LED degrades to a level where it is no longer considered sufficient for a given application. Understanding when an LED source reaches this useful life is important in lighting design. The ANSI/IES LM-80-15 standard is the commonly used IES standard for determining the lumen depreciation behavior of LEDs. Companies that manufacture LED equipment routinely issue ANSI/IES LM-80-15 reports for their products with data collected during testing over 6 hours or more. However, how the data collected from ANSI/IES LM-80-15 testing is used to best determine the useful life of the tested product is not well-defined. The nominal flux maintenance life of an LED is the elapsed operating time during which an LED light source retains a certain percentage of its initial light output.
The flux maintenance of an LED light source depends on many variables, including its operating temperature, driver current, and the technology and materials used to construct the product. Therefore, the flux maintenance of LEDs varies not only from manufacturer to company, but also between different types of LED packages.
Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of ANSI/IES TM-21-19 standard, long-term lumen, photon and radiant LED light sources It also provides testing services for the design of flux maintenance.
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