condition	mean	min	max
4 h after light	17.7202	17.0306	18.4098
8 h after light	16.7817	16.476	17.0874
12 h after light	16.29215	14.4237	18.1606
4 h after dark	18.84185	17.8422	19.8415
8 h after dark	20.4409	20.1486	20.7332
12 h after dark	20.02775	19.414	20.6415