condition	mean	min	max
4 h after light	6.391	6.2634300000000005	6.613510000000001
8 h after light	6.423556666666666	6.3445599999999995	6.49902
12 h after light	6.47932	6.333880000000001	6.59882
4 h after dark	6.626333333333333	6.595389999999999	6.65875
8 h after dark	6.66993	6.31977	6.846239999999999
12 h after dark	6.50492	6.32988	6.63777