condition	mean	min	max
4 h after light	18.521357000000002	17.816434	19.22628
8 h after light	20.342733000000003	20.00178	20.683686
12 h after light	18.386633500000002	16.341231	20.432036
4 h after dark	18.570207500000002	18.273634	18.866781
8 h after dark	15.0388895	14.394967	15.682812
12 h after dark	14.73138	14.73138	14.73138