condition	mean	min	max
4 h after light	7.639353333333333	7.55929	7.78642
8 h after light	7.48904	7.42237	7.613339999999999
12 h after light	7.40143	7.284860000000001	7.534960000000001
4 h after dark	7.47533	7.301839999999999	7.67362
8 h after dark	7.413706666666667	7.3522300000000005	7.53167
12 h after dark	7.52576	7.3461	7.710210000000001