condition	mean	min	max
4 h after light	8.365893333333332	7.7961800000000006	9.27436
8 h after light	7.948096666666666	7.64162	8.234
12 h after light	9.042453333333334	8.84182	9.38391
4 h after dark	8.055150000000001	7.962330000000001	8.215530000000001
8 h after dark	8.256783333333333	7.92726	8.54977
12 h after dark	7.88415	7.664280000000001	8.1997