condition	mean	min	max
4 h after light	8.591103333333333	8.51188	8.66123
8 h after light	8.45399	8.10178	8.868039999999999
12 h after light	8.52605	8.15921	8.97792
4 h after dark	8.792823333333333	8.36287	9.275839999999999
8 h after dark	8.76433	8.31446	9.33415
12 h after dark	8.303056666666667	8.03002	8.71298