condition	mean	min	max
0 h after light	15.53895	15.3409	15.737
4 h after light	7.84615	7.77958	7.91272
8 h after light	8.514085	8.24045	8.78772
4 h after dark	18.03605	17.8368	18.2353
8 h after dark	10.593765000000001	9.73723	11.4503
12 h after dark	12.91705	11.061	14.7731