condition	mean	min	max
4 h after light	8.999763333333334	8.81444	9.22586
8 h after light	8.99534	8.66232	9.597380000000001
12 h after light	8.730453333333333	8.39989	9.26095
4 h after dark	8.7639	8.45242	9.35781
8 h after dark	9.056773333333334	8.73585	9.57202
12 h after dark	9.25261	8.94615	9.797080000000001