condition	mean	min	max
4 h after light	7.26618	7.1795800000000005	7.35613
8 h after light	7.086519999999999	6.978619999999999	7.27795
12 h after light	6.962243333333333	6.8865	7.0799199999999995
4 h after dark	6.865236666666666	6.80575	6.895339999999999
8 h after dark	7.03931	6.9085600000000005	7.1384
12 h after dark	7.085293333333333	6.984369999999999	7.188280000000001