condition	mean	min	max
4 h after light	6.57636	6.29407	6.979830000000001
8 h after light	6.317563333333333	6.0176300000000005	6.50031
12 h after light	6.457066666666667	5.994269999999999	7.05433
4 h after dark	6.567083333333334	6.310230000000001	6.92707
8 h after dark	6.57064	6.19635	6.79501
12 h after dark	6.338996666666667	6.26164	6.40295