condition	mean	min	max
4 h after light	8.992526666666667	8.95309	9.052610000000001
8 h after light	8.91613	8.87797	8.963280000000001
12 h after light	8.64782	8.58055	8.71522
4 h after dark	8.958343333333332	8.74115	9.274289999999999
8 h after dark	9.114163333333334	9.04565	9.185789999999999
12 h after dark	9.29134	9.19848	9.39555