condition	mean	min	max
4 h after light	4.006476666666667	3.9609900000000002	4.04356
8 h after light	3.9540466666666667	3.77233	4.0578199999999995
12 h after light	3.9909266666666667	3.9045199999999998	4.12725
4 h after dark	4.05292	3.9735	4.12576
8 h after dark	3.9704400000000004	3.9313300000000004	4.00685
12 h after dark	3.9721699999999998	3.92549	3.99856