condition	mean	min	max
4 h after light	8.585396666666668	8.341280000000001	8.74825
8 h after light	8.928970000000001	8.71855	9.150730000000001
12 h after light	8.94735	8.665569999999999	9.11079
4 h after dark	8.83621	8.54529	9.036439999999999
8 h after dark	8.64644	8.340910000000001	8.92184
12 h after dark	8.506406666666667	8.080219999999999	8.76919