condition	mean	min	max
4 h after light	6.8929800000000006	6.706910000000001	6.98953
8 h after light	7.62356	7.43958	7.96802
12 h after light	6.84978	6.4671	7.24785
4 h after dark	7.499346666666667	7.232469999999999	7.76836
8 h after dark	7.152776666666666	7.004339999999999	7.29661
12 h after dark	6.40942	6.26163	6.6687199999999995