Under the rated power, temperature stress accelerated life test of BPZ 220/5 W JA55 bulb lamp was performed under thermal stress of 40 ℃ and 60 ℃ respectively, and the failure mechanism of the LED bulb samples was analyzed. A method to evaluate luminous-flux-attenuation activation energy value for LED bulb lamps was proposed, and a theoretical model to calculate luminous-flux-attenuation activation energy value was established in this paper. Thereby, the luminous-flux attenuation activation energy value of 0.67 eV was determined based on the above mentioned theory.
WU Deqi
,
WU Yiping
,
CHU Xiaoxing
. Evaluation methods of luminous-flux-attenuation activation energy for LED bulb lamp[J]. Journal of Hebei University(Natural Science Edition), 2023
, 43(6)
: 589
-594
.
DOI: 10.3969/j.issn.1000-1565.2023.06.004LED
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