condition	mean	min	max
4 h after light	8.683686666666667	8.6108	8.75408
8 h after light	8.681446666666666	8.255939999999999	8.966569999999999
12 h after light	8.349556666666667	8.14608	8.69766
4 h after dark	8.507093333333334	8.046710000000001	8.81676
8 h after dark	8.42601	8.038260000000001	8.64662
12 h after dark	7.9039399999999995	7.62782	8.082139999999999