The effect of pre-sleep lighting on melatonin, sleep and alertness of the crews in the enclosed cabins in the evening with the cumulative effect of light

IF 7.1 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Zhiming Gou , Bingchen Gou , Dengkai Chen , Xinwei Gao , Wenyi Liao , Yao Wang , Frédéric Bernard Leloup
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Abstract

The lighting field has seen tremendous growth in basic and applied research on the non-visual effects of light in the last more than 20 years, but lighting design for occupants in isolated, confined and enclosed environments a long time has still not been further developed. We investigated the effects of three-hour pre-sleep lighting intervention on melatonin, alertness and sleep of 24 healthy participants (23.58 ± 0.7 years; 12 males) for three days, within an enclosed cabin structure. A between-subjects design was used throughout the experiment, which included four lighting conditions (m-EDI: EL1, 200 lux; EL2, 20 lux; EL3, 40 lux; EL4, 10 lux), where CCT of EL1 and EL2, EL3 and EL4 were approximately the same. The results showed that whereas lighting conditions had almost little impact on indicators of morning, they had a significant impact on melatonin, objective alertness and sleep at night. The EL2 lighting had significantly higher melatonin suppression at night, and EL3 had significantly longer total sleep time and shorter R-period ratio, compared with EL4. The EL1 with high m-EDI had a considerably greater sleep efficiency and sustained higher objective alertness at night, but significantly lower subjective alertness compared with the other three lighting. Also, EL1 had significantly higher melatonin suppression compared with EL3 at night, and there was circadian rhythm phase delay. Two potential thresholds were implied to exist in night lighting intervention, one between 20–40 lux m-EDI affecting the cumulative effect of melatonin suppression, and one between 40–200 lux m-EDI enforcing circadian rhythm phase delay.

Abstract Image

傍晚在封闭的船舱中,睡前照明对船员褪黑激素、睡眠和警觉性的影响以及光的累积效应
过去 20 多年来,照明领域关于光的非视觉效应的基础研究和应用研究取得了巨大的发展,但长期以来,针对隔离、密闭和封闭环境中的居住者的照明设计仍未得到进一步发展。我们研究了 24 名健康参与者(23.58 ± 0.7 岁;12 名男性)在封闭的木屋结构中连续三天睡眠前三小时照明干预对褪黑激素、警觉性和睡眠的影响。整个实验采用被试间设计,包括四种照明条件(m-EDI:EL1,200 勒克斯;EL2,20 勒克斯;EL3,40 勒克斯;EL4,10 勒克斯),其中 EL1 和 EL2、EL3 和 EL4 的 CCT 大致相同。结果表明,虽然照明条件对早晨的指标几乎没有影响,但对褪黑激素、客观警觉性和夜间睡眠有显著影响。与 EL4 相比,EL2 的照明对夜间褪黑激素的抑制明显更高,EL3 的总睡眠时间明显更长,R-周期比率更短。与其他三种照明方式相比,高 m-EDI 的 EL1 的睡眠效率要高得多,夜间的客观警觉性也持续较高,但主观警觉性却明显较低。此外,与 EL3 相比,EL1 在夜间对褪黑激素的抑制明显更高,而且存在昼夜节律相位延迟。这意味着夜间照明干预存在两个潜在阈值,一个在 20-40 勒克斯 m-EDI 之间,影响褪黑激素抑制的累积效应,另一个在 40-200 勒克斯 m-EDI 之间,强制昼夜节律相位延迟。
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来源期刊
Building and Environment
Building and Environment 工程技术-工程:环境
CiteScore
12.50
自引率
23.00%
发文量
1130
审稿时长
27 days
期刊介绍: Building and Environment, an international journal, is dedicated to publishing original research papers, comprehensive review articles, editorials, and short communications in the fields of building science, urban physics, and human interaction with the indoor and outdoor built environment. The journal emphasizes innovative technologies and knowledge verified through measurement and analysis. It covers environmental performance across various spatial scales, from cities and communities to buildings and systems, fostering collaborative, multi-disciplinary research with broader significance.
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