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- W2338619294 abstract "Light emitting diodes, with advantages in energy savings, luminous efficacy and greater reliability, are becoming preferred over conventional white light sources. Currently, only light output depreciation is considered for life estimation of light emitting diode luminaires but it is recommended to include colour shift variations for applications demanding colour stability. In this paper, an extended Kalman filter is employed to determine L70 life and colour temperature degradation over life of a light emitting diode luminaire. The colour shift in terms of Duv is determined by statistical polynomial cure fitting. The variation in chromaticity coordinates over life is determined and life based on colour shift is determined by acceptable Duv limits. The results are compared to life determined by the IES-TM-21 method and the correlated colour temperature limits taken from the luminaire data sheet." @default.
- W2338619294 created "2016-06-24" @default.
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- W2338619294 date "2016-08-03" @default.
- W2338619294 modified "2023-09-24" @default.
- W2338619294 title "LED life prediction based on lumen depreciation and colour shift" @default.
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- W2338619294 doi "https://doi.org/10.1177/1477153515593580" @default.
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