condition	mean	min	max
4 h after light	9.24816	9.0918	9.46222
8 h after light	8.66293	8.53271	8.77185
12 h after light	8.120403333333332	7.96604	8.20277
4 h after dark	7.797773333333333	7.56469	8.006969999999999
8 h after dark	8.345373333333335	8.1203	8.481710000000001
12 h after dark	8.491076666666666	8.32907	8.697289999999999