condition	mean	min	max
4 h after light	6.152876666666667	6.12408	6.1987
8 h after light	6.387096666666666	6.29876	6.54714
12 h after light	6.43794	6.3684400000000005	6.57211
4 h after dark	6.488503333333333	6.36076	6.6630199999999995
8 h after dark	6.25975	6.11239	6.50748
12 h after dark	6.26497	6.2111	6.35166