This study extends previous findings on the effect of different levels of short-wavelength light on human alertness. This study explores the alerting ability of long-wavelength light at two levels (40 lx and 160 lx). Eight subjects took part in the 60-minute experiment for each of two nights, during which their objective alertness and subjective alertness were evaluated using electroencephalogram and questionnaire. Results show that both levels increased electroencephalogram beta power, which shows a different pattern compared with the previous findings on short-wavelength light. These results strongly suggest that although short-wavelength light may impact alertness through circadian system, long-wavelength light will have to achieve that through other pathways. The further comparison between current and previous results also suggests that long-wavelength light is just as strong on acute alerting ability, as shown by electroencephalogram measures and self-rating questionnaire, as short-wavelength light.

中文翻译：

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长波长光对脑电图和主观警觉性的影响

这项研究扩展了先前关于不同水平的短波长光对人类警觉性的影响的发现。本研究探讨了长波长光在两个级别（40 lx 和 160 lx）的警报能力。八名受试者每晚参加 60 分钟的实验，在此期间通过脑电图和问卷评估他们的客观警觉性和主观警觉性。结果表明，这两个水平都增加了脑电图 beta 功率，与之前对短波长光的发现相比，这显示出不同的模式。这些结果强烈表明，虽然短波光可能通过昼夜节律系统影响警觉性，但长波光必须通过其他途径来实现这一点。