condition	mean	min	max
4 h after light	6.41755	6.21534	6.7037
8 h after light	6.535163333333334	6.435230000000001	6.692360000000001
12 h after light	6.431986666666666	6.17385	6.7179199999999994
4 h after dark	6.65293	6.48109	6.90532
8 h after dark	6.411206666666667	6.28906	6.47881
12 h after dark	6.47407	6.31429	6.716480000000001