condition	mean	min	max
4 h after light	6.572113333333333	6.45833	6.66967
8 h after light	6.4705	6.224880000000001	6.802239999999999
12 h after light	6.237663333333333	6.08651	6.42666
4 h after dark	6.5637533333333336	6.3083	6.86107
8 h after dark	6.60657	6.401330000000001	6.77804
12 h after dark	7.297616666666667	7.02402	7.498530000000001