condition	mean	min	max
4 h after light	8.409876666666667	8.33726	8.52175
8 h after light	8.32772	8.18874	8.53014
12 h after light	8.19341	8.11409	8.289719999999999
4 h after dark	8.325326666666667	8.24222	8.4596
8 h after dark	8.359283333333334	8.1648	8.48156
12 h after dark	8.37185	8.353710000000001	8.39628