condition	mean	min	max
4 h after light	6.220866666666667	5.94834	6.3589400000000005
8 h after light	6.432040000000001	6.405390000000001	6.47733
12 h after light	6.09532	5.94848	6.26359
4 h after dark	6.574743333333333	6.430630000000001	6.6524600000000005
8 h after dark	6.591166666666667	6.5448	6.6386199999999995
12 h after dark	6.52101	6.416530000000001	6.597860000000001