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Content DescriptionThe rated flux maintenance life of an LED is the elapsed operating time over which an LED light source maintains a given percentage of its initial light output. The flux maintenance of an LED light source is dependent upon many variables, including the operating temperature, drive current, and technology and materials used to construct the product. As such, the flux maintenance of LEDs can vary not only from manufacturer to manufacturer, but also between different LED package types produced by a single manufacturer. Further, it is important to consider the inherent limits to projected source life as extrapolated from test data. This document updates its recommended method of projecting the flux maintenance of LED light sources from the data obtained by IES LM-80 testing. The update of this document was accomplished by a dedicated TM-21 Working Group of LED industry professionals. The analyses of the IES LM-80 test data provided by major LED manufacturers are used to rationalize and support this document. Much of the IES LM-80 data came from testing that extended to 9,000 hours, and in some cases beyond.This book also exists in the following packages...Subscription InformationMADCAD.com IES subscriptions are annual and access is concurrency based (number of people that can access the subscription at any given time).
Some features of MADCAD.com IES Subscriptions are:
- Floating concurrency model: Set your concurrency level and share your IES Subscriptions among your offices enterprise-wide.
- Immediate Access: As soon as the transaction is completed, your IES Subscription will be ready for access.
For any further information on MADCAD.com IES Subscriptions, please contact us at info@madcad.com or +1 800.798.9296. About IESThe Illuminating Engineering Society of North America (IES) is the recognized technical authority on illumination. For over 100 years; its objective has been to communicate information on all aspects of good lighting practice to its members, to the lighting community, and to consumers, through a variety of programs, publications, and services. |
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