condition	mean	min	max
4 h after light	6.640896666666667	6.5288	6.7028300000000005
8 h after light	6.930280000000001	6.794010000000001	7.06805
12 h after light	6.780593333333333	6.69889	6.94215
4 h after dark	6.750369999999999	6.6218699999999995	6.81602
8 h after dark	6.516046666666667	6.50013	6.52865
12 h after dark	6.457843333333333	6.41298	6.51845