condition	mean	min	max
0 h after light	15.762	15.4995	16.0245
4 h after light	14.28275	13.8017	14.7638
8 h after light	9.29674	8.8747	9.71878
4 h after dark	12.39053	9.94936	14.8317
8 h after dark	15.51475	15.4193	15.6102
12 h after dark	12.52845	11.9357	13.1212