Lighting Illuminance Influence on Blue Light Induced Melatonin Depression

Tang, Shanshan; Guo, Ya; Hao, Wentao; Huang, Shuai; Wei, Ke; Wen, Rong; Cai, Jianqi; Luo, Aiqin

doi:10.1109/ifws.2018.8587390

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2019

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“…However, it should be remarked that electric light sources have strong effects on circadian rhythms in physiology, metabolism, and behavior. For example, recent experimental evidence in humans has shown that the lighting commonly used in typical homes in the evening is enough to delay melatonin onset and weaken its nocturnal peak [10]. Blue light in the range of 450~480 nm has been proved to induce melatonin depression.…”

Section: Introductionmentioning

confidence: 99%

Power Source Electronic Ballast for Electrodeless Fluorescent Lamps

et al. 2019

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This paper presents the design, control strategy and experimental results of a two-step, power factor correction stage (PFC) and resonant inverter (RI), electronic ballast proposal to supply 150 W electrodeless fluorescent lamps (EFL). The PFC acts as a controlled power source and provides mid and long-term stability to the system, while the stability of the current through the lamp is achieved with the RI. In addition, the power-mode control requires limitation of the output voltage. The dual operation mode of the PFC (voltage source mode and power source mode) enables an efficient soft resonant ignition and the implementation of simple dimming regulation.

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Section: Introductionmentioning

confidence: 99%