condition	mean	min	max
4 h after light	6.915413333333333	6.785830000000001	7.121510000000001
8 h after light	6.797336666666666	6.57233	6.9448
12 h after light	6.80231	6.7023	6.96137
4 h after dark	6.791406666666666	6.72	6.91592
8 h after dark	6.749289999999999	6.309769999999999	7.018039999999999
12 h after dark	6.862253333333333	6.65445	7.02146