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- W2180449143 abstract "Light Emitting Diode (LED) luminaires and lamps are energy-saving and environmental friendly alternatives to traditional lighting products. However, current luminous flux depreciation test at luminaire and lamp level requires a minimum of 6000 h testing, which is even longer than the product development cycle time. This paper develops an accelerated test method for luminous flux depreciation to reduce the test time within 2000 h at an elevated temperature. The method is based on lumen maintenance boundary curve, obtained from a collection of LED source lumen depreciation data, known as LM-80 data. The exponential decay model and Arrhenius acceleration relationship are used to determine the new threshold of lumen maintenance and acceleration factor. The proposed method has been verified by a number of simulation studies and experimental data for a wide range of LED luminaire and lamp types from both internal and external experiments. The qualification results obtained by the accelerated test method agree well with traditional 6000 h tests." @default.
- W2180449143 created "2016-06-24" @default.
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- W2180449143 date "2016-03-01" @default.
- W2180449143 modified "2023-09-27" @default.
- W2180449143 title "An accelerated test method of luminous flux depreciation for LED luminaires and lamps" @default.
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- W2180449143 doi "https://doi.org/10.1016/j.ress.2015.11.009" @default.
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