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Light helps mankind synchronize the circadian rhythm, necessitating the need to create a luminous environment in a bedroom. Many studies have focused on the effect of bedroom lighting regulation on sleep. However, there was a lack of research on how psychology responses are connected to sleep in residential bedroom. Thus, this chamber-based study explored mood differences among three correlated color temperatures (CCT; 2700 K, 4100 K, 5500 K). Additionally, the study analyzed the correlation of pre- and post-sleep psychological states with sleep quality. The results showed that suitable artificial lights (CCT at 2700K) in a bedroom before and after sleep under different conditions would provide the relaxation for subjects. Moreover, SOL, SWS, and SE were significantly different across different CCTs. According to the correlation and regression analysis, there were four groups of Pearson significantly correlated variables with coefficients of determination ranging from 0.34 to 0.70. Among them, 67% of the variation in SOL could be explained by the degree of pre sleep relaxation and pleasure. Furthermore, abundant and healthy sleep might perpetuate the mood generated by artificial lights. Finally, the roles of psychological states and sleep physiological responses should be considered while creating comfortable lighting conditions in bedrooms.

Associations between psychological responses under artificial light environment and sleep activity