condition	mean	min	max
4 h after light	7.70932	7.303999999999999	7.99852
8 h after light	7.696070000000001	7.086410000000001	8.2051
12 h after light	8.144983333333332	7.4842699999999995	8.53759
4 h after dark	7.73149	7.26882	8.182319999999999
8 h after dark	7.480246666666667	6.96875	7.98468
12 h after dark	7.119796666666667	6.47981	7.60133