美国科学家就人体对灯光的反应进行了长达５年的研究后发现：室内一般的照明即可改变人体生物钟的正常运转，而并非强光。这一发现表明，由于电灯的普遍使用，大多数人因每天接受过多的光线照射而对生物钟产生的影响，可能要比原先估计的大得多。早先的研究显示，只有强烈的光 American scientists on the body’s response to the light for up to 5 years of research and found that: indoor general lighting can change the normal operation of the human body clock, rather than glare. This finding suggests that most people, due to the widespread use of electric lights, may have a much greater impact on the circadian clock due to excessive light exposure each day than previously estimated. Earlier studies have shown that there is only intense light