condition	mean	min	max
4 h after light	8.41287	8.39499	8.4236
8 h after light	8.381723333333333	8.23493	8.462860000000001
12 h after light	8.495723333333334	8.41849	8.63373
4 h after dark	8.346866666666667	8.1895	8.494819999999999
8 h after dark	8.40931	8.34597	8.44582
12 h after dark	8.50931	8.4203	8.556289999999999