condition	mean	min	max
4 h after light	8.855916666666667	8.70659	8.951830000000001
8 h after light	8.779646666666666	8.54773	8.95092
12 h after light	8.766193333333334	8.541160000000001	9.064860000000001
4 h after dark	9.167769999999999	8.9624	9.333789999999999
8 h after dark	9.13887	8.9417	9.27543
12 h after dark	9.521473333333333	9.36547	9.76402