condition	mean	min	max
4 h after light	6.991416666666667	6.959039999999999	7.0475
8 h after light	7.16462	7.07877	7.30165
12 h after light	7.131866666666666	7.060739999999999	7.1985
4 h after dark	7.054226666666667	6.974710000000001	7.13152
8 h after dark	6.9775599999999995	6.8193399999999995	7.12622
12 h after dark	6.84887	6.7232199999999995	7.0066