condition	mean	min	max
4 h after light	8.940236666666667	8.72076	9.06825
8 h after light	9.12092	8.91411	9.25295
12 h after light	9.215209999999999	9.0636	9.33372
4 h after dark	8.956109999999999	8.90537	9.048969999999999
8 h after dark	9.052253333333333	9.00636	9.09667
12 h after dark	8.940646666666668	8.75805	9.08153