condition	mean	min	max
4 h after light	8.353166666666667	8.16164	8.45737
8 h after light	7.951036666666666	7.83367	8.10807
12 h after light	8.037403333333334	7.987610000000001	8.12306
4 h after dark	7.86281	7.702889999999999	8.111
8 h after dark	7.9770900000000005	7.803030000000001	8.108460000000001
12 h after dark	8.07465	7.95478	8.16961