condition	mean	min	max
4 h after light	7.814415	6.99417	8.63466
8 h after light	6.155115	5.76475	6.54548
12 h after light	6.45166	6.34714	6.55618
4 h after dark	7.36677	6.93705	7.85434
8 h after dark	8.546466666666667	7.58662	9.04429
12 h after dark	7.31643	7.00199	7.68104