Searched for: subject:"lumen%5C+depreciation"
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Yazdan Mehr, M. (author), Bahrami, A. (author), van Driel, W.D. (author), Fan, Xuejun (author), Davis, J.L. (author), Zhang, G.Q. (author)
In this paper, degradation mechanisms of optical materials, used in the light emitting diode (LED)-based products, are reviewed. The LED lighting is one of the fastest technology shifts in human history. Lighting accounts for almost 20% of the global electrical energy use, inferring that replacement of traditional lighting sources with LEDs...
journal article 2019
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Sun, B (author), Fan, Xuejun (author), van Driel, W.D. (author), Cui, C (author), Zhang, G.Q. (author)
In this study, we present a general methodology that combines the reliability theory with physics of failure for reliability prediction of an LED driver. More specifically, an integrated LED lamp, which includes an LED light source with statistical distribution of luminous flux, and a driver with a few critical components, is considered. The...
journal article 2018
document
Yazdan Mehr, M. (author), van Driel, W.D. (author), Zhang, G.Q. (author)
In this paper, progresses of color maintenance, also known as color shift, in solid-state lighting (SSL) systems are thoroughly reviewed. First, color shift is introduced and a few examples are given from different real-life industrial conditions. Different degradation mechanisms in different parts of the system are also explained. Different...
review 2015