condition	mean	min	max
4 h after light	7.716676666666666	7.66927	7.805039999999999
8 h after light	7.262136666666667	7.183389999999999	7.37103
12 h after light	7.659870000000001	7.59123	7.72042
4 h after dark	7.702776666666666	7.5716399999999995	7.92435
8 h after dark	7.602539999999999	7.534260000000001	7.641189999999999
12 h after dark	7.51932	7.42137	7.65017