condition	mean	min	max
4 h after light	6.811006666666667	6.69177	6.88868
8 h after light	6.68422	6.64318	6.73835
12 h after light	6.635619999999999	6.39808	6.86074
4 h after dark	6.558763333333333	6.3365599999999995	6.683260000000001
8 h after dark	6.636826666666667	6.44404	6.744610000000001
12 h after dark	6.80309	6.723910000000001	6.91403