condition	mean	min	max
4 h after light	8.471	8.3737	8.62202
8 h after light	8.39254	8.25958	8.614310000000001
12 h after light	8.5928	8.52741	8.701360000000001
4 h after dark	8.492096666666667	8.384160000000001	8.60068
8 h after dark	8.286056666666667	8.07891	8.59845
12 h after dark	8.3724	8.24198	8.62193