condition	mean	min	max
4 h after light	8.728036666666666	8.57432	8.98039
8 h after light	8.637220000000001	8.508980000000001	8.771980000000001
12 h after light	8.281236666666667	8.09832	8.55514
4 h after dark	8.708103333333334	8.51308	8.81765
8 h after dark	8.855763333333334	8.80441	8.90675
12 h after dark	9.17438	8.97325	9.48445