Influence of the spectrum of all-day LED lighting on human daytime and nighttime performance

Nuoyi Li, Sicong Zhou, Wenqing Miao, Congshan Dai, Ali Hassan Shah, Yandan Lin
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Abstract

Indoor LED lighting is directly related to people’s health and performance. This experiment investigated the effect of the spectrum of LED lighting on human daytime and nighttime performance. Six different LEDs were selected for the experiment: ordinary LEDs and daylight LEDs that mimic the full spectrum, with CCTs of 2700K, 4000K, and 5000K for each spectral type (2 spectral types * 3 CCT). A total of 24 subjects participated in the experiment. Each subject was assigned to a specific CCT and experienced two spectral types on different days. Subjects were given a predetermined light exposure for 12 hours a day for each experiment. By analyzing the subjects' performance during the daytime light exposure and nighttime sleep quality after, we found that daytime exposure to light with stronger non-visual stimulus led to higher daytime alertness and better nighttime sleep quality, and the lack of daytime light stimuli led to poor night sleep quality. However, changes in spectral composition within a small range were not enough to cause a sufficiently significantly improve in daily human performance.
全天LED照明光谱对人体白天和夜间表现的影响
室内LED照明直接关系到人们的身体健康和工作表现。本实验研究了LED照明的光谱对人类白天和夜间行为的影响。实验中选择了6种不同的led:普通led和模拟全光谱的日光led,每种光谱类型的CCT分别为2700K、4000K和5000K(2种光谱类型* 3 CCT)。共有24名受试者参加了实验。每个受试者被分配到一个特定的CCT,并在不同的日子经历两种光谱类型。在每个实验中,受试者每天被预先安排12小时的光照。通过分析被试在白天光照时的表现和光照后的夜间睡眠质量,我们发现白天暴露在非视觉刺激较强的光照下,白天警觉性较高,夜间睡眠质量较好,而缺乏光照刺激则导致夜间睡眠质量较差。然而,光谱组成在小范围内的变化不足以引起人类日常表现的足够显著的改善。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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