condition	mean	min	max
4 h after light	6.727736666666666	6.706180000000001	6.753539999999999
8 h after light	6.757046666666667	6.6063	7.00162
12 h after light	6.7283599999999995	6.550269999999999	6.982419999999999
4 h after dark	7.043783333333334	6.952780000000001	7.16874
8 h after dark	6.84602	6.77653	6.89023
12 h after dark	7.025379999999999	6.91471	7.179189999999999