condition	mean	min	max
4 h after light	8.064836666666666	7.7743199999999995	8.29304
8 h after light	8.02455	7.49746	8.30095
12 h after light	8.153103333333334	7.59083	8.472660000000001
4 h after dark	8.094163333333332	7.801660000000001	8.312489999999999
8 h after dark	7.986956666666667	7.6542	8.30076
12 h after dark	7.93574	7.82115	8.01334