condition	mean	min	max
4 h after light	14.849150000000002	12.6713	17.027
8 h after light	12.426714999999998	8.43043	16.423
12 h after light	8.79646	6.82872	10.7642
4 h after dark	18.54085	18.4078	18.6739
8 h after dark	14.39965	11.7849	17.0144
12 h after dark	11.651254999999999	9.17551	14.127