Projecting Long-Term Luminous Flux Maintenance of LED Lamps and Luminaires

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The objective of this Technical Memorandum is to provide guidance and recommended procedures for sampling, test intervals and duration, and a method for long term luminous flux maintenance projection for LED lamps and luminaires.

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SKU: TM-28-14 Category:

Description

The objective of this Technical Memorandum is to provide guidance and recommended procedures for sampling, test intervals and duration, and a method for long term luminous flux maintenance projection for LED lamps and luminaires. The intent is to help product manufacturers and users, standard developing bodies, and other organizations to avoid any unnecessary burdens related to excessive product testing.

A balance was sought between testing time and effort, on one side, and sufficient statistical rigor, on the other. A direct and a combined method for luminous flux maintenance projection are proposed; the latter allows the use of luminous flux maintenance data obtained for both the lamp or luminaire being tested, and the LED sources used in it.

Softcover or Digital PDF: 12 pages
Publisher: Illuminating Engineering Society (2014)
SKU: TM-28-14
ISBN-13: 978-0-87995-296-9
Dimensions: 8½” x 11″

Additional information

Weight 1 lbs
Dimensions 11 x 8.5 x .25 in
Format

Digital, Softcover

Table of Contents

  • Scope
  • Normative References
  • Definitions
  • Samples and Test Data and Samples
  • Luminous Flux Maintenance Projection
  • Annex A LED Forward Current in the Combined Extrapolation Method
  • Annex B Derivation of the Formulas Used for Combined Extrapolation Method
  • Annex C Example of the Combined Extrapolation Method
  • Annex D Statistical Modeling
  • Informative References