condition	mean	min	max
4 h after light	17.8124	15.6491	19.9757
8 h after light	15.271	14.4004	16.1416
12 h after light	12.6755	11.5996	13.7514
4 h after dark	16.588	15.0584	17.7623
8 h after dark	18.36873333333333	16.7839	20.4898
12 h after dark	18.4583	15.209	20.4781