condition	mean	min	max
4 h after light	15.301	11.3006	19.2403
8 h after light	10.20001	3.01543	16.9982
12 h after light	13.6533	8.3222	20.2934
4 h after dark	16.714466666666667	12.3999	19.0112
8 h after dark	18.5285	14.2762	20.9926
12 h after dark	17.0744	15.7336	18.5358