condition	mean	min	max
4 h after light	18.782819500000002	18.183121	19.382518
8 h after light	15.523603999999999	13.109767	17.937441
12 h after light	15.157491499999999	13.973752	16.341231
4 h after dark	17.4801585	16.341231	18.619086
8 h after dark	16.257295	16.173359	16.341231
12 h after dark	15.455188	15.455188	15.455188