condition	mean	min	max
4 h after light	7.958500000000001	7.800260000000001	8.12621
8 h after light	7.8075399999999995	7.50213	8.0575
12 h after light	7.977816666666667	7.7035100000000005	8.283619999999999
4 h after dark	7.201510000000001	6.93049	7.346430000000001
8 h after dark	7.0589	6.93533	7.15809
12 h after dark	7.19577	7.075710000000001	7.35031