condition	mean	min	max
0 h after light	18.9141	18.3929	19.4353
4 h after light	7.142950000000001	7.09759	7.18831
8 h after light	7.387815	7.26452	7.51111
4 h after dark	13.33495	12.9539	13.716
8 h after dark	13.3834	13.0124	13.7544
12 h after dark	15.169900000000002	12.8343	17.5055