Due to the dominant presence of studies and reviews exploring the impact of light on physical and mental illness, studies specifically investigating the effect of light on wellbeing are often overshadowed. The aim of this review is to give an overview of specifically these studies conducted on light and wellbeing, and to summarize the reported effects. After a literature search in PubMed, PsycInfo, and Web of Science, 74 studies were found eligible to be included in this systematic review, i.e. they included surveys assessing wellbeing, happiness, life satisfaction, positive affect, or quality of life. Of these 74 studies, 30 were included in the meta-analysis and assessed for their risk of bias. The meta-analysis showed a pooled effect size of 0.46 (CI = 0.29–0.62), indicating that light has a small-to-moderate positive effect on wellbeing. After removing outliers and studies with a high risk of bias, the sensitivity analysis showed the pooled effect size to be robust (0.53, CI = 0.35–0.72). Although the sensitivity analysis indicated a robust effect, the results might still be biased due to the relatively small sample sizes, risk of bias in the designs (due to e.g. difficulties handling confounders and the reporting of the outcomes), and publication bias. We encourage future studies to replicate these positive results in larger samples, and to give extensive details about the light design and statistical outcomes, to increase the number of studies that can be included in these types of systematic reviews.

由于探索光对身体和精神疾病影响的研究和评论占主导地位，专门调查光对健康影响的研究往往被掩盖。本综述的目的是对这些关于光和健康的研究进行具体概述，并总结报告的效果。在 PubMed、PsycInfo 和 Web of Science 中进行文献搜索后，发现 74 项研究有资格纳入本系统评价，即它们包括评估幸福感、幸福感、生活满意度、积极影响或生活质量的调查。在这 74 项研究中，有 30 项被纳入荟萃分析并评估了其偏倚风险。荟萃分析显示汇总效应量为 0.46 （CI = 0.29-0.62），表明光对幸福感有小到中度的积极影响。在去除异常值和具有高偏倚风险的研究后，敏感性分析显示合并效应量是稳健的 （0.53，CI = 0.35-0.72）。 尽管敏感性分析表明了稳健的效果，但由于样本量相对较小、设计中存在偏倚风险（例如由于处理混杂因素和结局报告的困难）和发表偏倚，结果可能仍然存在偏倚。我们鼓励未来的研究在更大的样本中复制这些积极的结果，并提供有关光照设计和统计结果的广泛细节，以增加可以纳入这些类型系统综述的研究数量。