Statistical Analysis of Lumen Depreciation for LED Packages

Book chapter (2018)

Authors

M. Schuld Consultants in Quantitative Methods (CQM)
B. Jacobs Philips Lighting Research

Contributors

W.D. van Driel Philips Lighting Research, Electronic Components, Technology and Materials - EEMCS (editor)
Research Group
Electronic Components, Technology and Materials (EEMCS) (TU Delft)
Copyright: © 2018 M. Schuld, B. Jacobs
DOI: https://doi.org/10.1007/978-3-319-58175-0_17
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Published Date

2018

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Components, Technology and Materials

Abstract

Commercial claims for LED-based products in terms of lumen maintenance are fully based on TM-21 extrapolations using LM-80 data. This chapter indicates that there may be a risk in doing this as TM-21 only relies on the behavior of the average LED degradation, instead of taking into account the degradation of all individual LEDs. Therefore, we propose a more profound statistical approach in order to make the appropriate step from TM-21 extrapolation to lumen maintenance on a product level. This is needed as some commercial claims are based on 10 years of warranty and some service bids provide periods of 20–25 years of operation. This chapter reviews the different approaches currently available to perform lumen maintenance extrapolations.

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