condition	mean	min	max
4 h after light	6.06438	5.9002099999999995	6.23149
8 h after light	6.29489	6.2184800000000005	6.36707
12 h after light	6.4106000000000005	6.27988	6.515280000000001
4 h after dark	6.283263333333333	6.2171199999999995	6.3182599999999995
8 h after dark	6.126643333333333	5.9297699999999995	6.34314
12 h after dark	6.232566666666667	6.13129	6.37197