Long-term stability of LED filament standard lamps for total luminous flux

Jinyun Yan; Hui Liu; Weiqiang Zhao; Ying Su

doi:10.1117/12.2602256

9 October 2021 Long-term stability of LED filament standard lamps for total luminous flux

Jinyun Yan, Hui Liu, Weiqiang Zhao, Ying Su

Proceedings Volume 11899, Optical Metrology and Inspection for Industrial Applications VIII; 1189918 (2021) https://doi.org/10.1117/12.2602256
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

NIM has developed LED filament standard lamps for total luminous flux with excellent long-term stability, uniform distribution of luminous intensity, and the E27 Edison screw base which is compatible with present incandescent standard lamps. The standard lamp consists of six high-power LED filaments which are sealed in a G150 glass bulb and filled with He gas. All the 12 lamps were aged for 500 hours before the 315 days’ long-term stability test. 9 lamps are lighted for 1 hour every day. One lamp is continuously operated for about 6000 hours, and 2 lamps are well stored on a shelf. The results show that the long-term stabilities of the 3 cases are better than 0.07%. This LED filament lamp could be promising as a transfer standard of total luminous flux.

Citation Download Citation

Jinyun Yan, Hui Liu, Weiqiang Zhao, and Ying Su "Long-term stability of LED filament standard lamps for total luminous flux", Proc. SPIE 11899, Optical Metrology and Inspection for Industrial Applications VIII, 1189918 (9 October 2021); https://doi.org/10.1117/12.2602256

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