condition	mean	min	max
4 h after light	9.30795	9.118889999999999	9.480960000000001
8 h after light	9.456503333333334	9.3635	9.59943
12 h after light	9.47562	9.34215	9.63902
4 h after dark	9.327133333333334	9.24271	9.46454
8 h after dark	9.21226	9.051810000000001	9.41052
12 h after dark	9.148546666666666	8.89281	9.36592