condition	mean	min	max
4 h after light	4.302676666666667	4.248069999999999	4.39347
8 h after light	4.278543333333333	4.15644	4.34891
12 h after light	4.25486	4.23883	4.27305
4 h after dark	4.2814700000000006	4.212330000000001	4.36828
8 h after dark	4.225523333333333	4.10724	4.28872
12 h after dark	4.16779	4.13547	4.18576