condition	mean	min	max
4 h after light	15.199312	14.852792	15.545832
8 h after light	17.524006	15.663137	19.384875
12 h after light	15.281308500000002	14.637382	15.925235
4 h after dark	12.720219	12.389733	13.050705
8 h after dark	15.692246	15.567353	15.817139
12 h after dark	16.110379	16.110379	16.110379