condition	mean	min	max
4 h after light	8.963773333333332	8.807269999999999	9.18243
8 h after light	8.79013	8.6006	9.06521
12 h after light	8.881586666666667	8.62232	9.11238
4 h after dark	8.639850000000001	8.2832	8.9517
8 h after dark	8.548433333333334	8.300839999999999	8.9607
12 h after dark	8.605459999999999	8.42004	8.85822