condition	mean	min	max
4 h after light	15.539223333333332	9.77257	19.1462
8 h after light	17.144856666666666	6.65457	22.6389
12 h after light	18.6555	14.5422	20.7138
4 h after dark	19.033733333333334	12.9799	23.9597
8 h after dark	16.6108	16.1303	17.03
12 h after dark	13.25417	9.06481	15.5811