2026-03-10T13:23:21Z https://edo.repo.nii.ac.jp/oai

oai:edo.repo.nii.ac.jp:00000982 2024-05-21T05:36:20Z 1:72

Changing “white and bright” room light to“dim and umber” one had significant effects on residents’sleep patterns Changing “white and bright” room light to“dim and umber” one had significant effects on residents’sleep patterns Kazuhiko, Fukuda フクダ, カズヒコ Shoichi, Asaoka 浅岡, 章一 アサオカ, ショウイチ Shoichi 浅岡 アサオカ Asaoka 章一 ショウイチ Chiori, Kaki カキ, チオリ Saaya, Yokoyama ヨコヤマ, サアヤ Kiichi, Hirai ヒライ, キイチ Room light conditions color temperature illuminance sleep-wake patterns P(論文) Japanese people are known for their short sleep time, which is resulting from their late bedtime. Light\ exposure, especially with short wave length, has significant effects of delaying circadian rhythms. Room lightsused in Japanese houses are mostly “bright and white” fluorescent or LED devices. There are many laboratory experiments demonstrating the effects of light on sleep and wake patterns, however, light effects have not been confirmed in actual house settings. We conducted an intervention study of changing light condition in actual houses. We provided “dim and umber” type light devices to the house with “bright and white” type light devices. In experimental group, where the lights were changed to the “dim and umber types, sleep and wake patterns were advanced significantly, compared to the control group. While in the control group with “bright and white” light type, the residents showed significant delay in their sleep and wake patterns, only within a week period. In the experimental group, they showed significant improvements in their mental health. There are possibilities of beneficial changes, if the “dim and umber” type light settings are introduced into Japanese houses. 江戸川大学 2021-03-15 eng departmental bulletin paper https://doi.org/10.50831/00000963 https://edo.repo.nii.ac.jp/records/982 10.50831/00000963 AA12560733 江戸川大学紀要 Bulletin of Edogawa University 31 31 37 https://edo.repo.nii.ac.jp/record/982/files/DK2021-03.pdf application/pdf 401.7 kB 2021-03-31