Lumen Maintenance Predictions for LED Packages using LM80 data

Conference paper (2015)

Authors

W.D. van Driel Electronic Components, Technology and Materials - EEMCS , Philips Lighting Research
M. Schuld Consultants in Quantitative Methods (CQM)
B Jacobs Philips Lighting Research
F. Commissaris Philips Lighting Research
J van der Eyden Philips Lighting Research
Benoit Hamon Philips Lighting, Miribel
Research Group
Electronic Components, Technology and Materials (EEMCS) (TU Delft)
Degradation Reliability Fluorescence Light emitting diodes Standards Computational modeling Maintenance engineering
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Published Date

2015

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Components, Technology and Materials

Abstract

Per today, commercial claims for LED-based products in terms of lumen maintenance are fully based on TM-21 extrapolations using LM80 data. 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. A more profound statistical analysis is required to make the step from TM-21 extrapolation to lumen maintenance on product level. This is needed as the commercial claims are used as input for service bids up to periods of 20 to 25 years of operation. This paper describes the different approaches currently available to perform lumen maintenance extrapolations. For that, we have analyzed several LM80 data sets from a statistical point of view.