condition	mean	min	max
4 h after light	6.123833333333333	6.05589	6.187209999999999
8 h after light	6.290426666666667	6.25244	6.3457099999999995
12 h after light	6.177326666666667	6.06342	6.39956
4 h after dark	6.1845799999999995	6.0786	6.38448
8 h after dark	6.10261	6.00875	6.16863
12 h after dark	6.10324	6.0486	6.14433