condition	mean	min	max
4 h after light	8.615183333333333	8.48985	8.70173
8 h after light	8.639706666666667	8.60779	8.67918
12 h after light	8.55367	8.273539999999999	8.744110000000001
4 h after dark	8.676543333333333	8.49033	8.798210000000001
8 h after dark	8.602813333333334	8.454939999999999	8.750680000000001
12 h after dark	8.9829	8.91938	9.03965