condition	mean	min	max
4 h after light	6.699446666666666	6.5858	6.85265
8 h after light	6.72502	6.66622	6.76387
12 h after light	6.74111	6.50284	6.91075
4 h after dark	6.687566666666666	6.59955	6.77481
8 h after dark	6.761116666666666	6.56973	6.96875
12 h after dark	6.57732	6.44752	6.6757100000000005