condition	mean	min	max
4 h after light	6.17245	6.11498	6.2199800000000005
8 h after light	6.22734	6.10105	6.2934
12 h after light	6.0373399999999995	5.5719199999999995	6.28557
4 h after dark	6.099143333333333	5.70718	6.35271
8 h after dark	6.149666666666667	5.95971	6.2799
12 h after dark	6.195883333333334	6.1310199999999995	6.23969