condition	mean	min	max
4 h after light	16.17875	14.9043	17.4532
8 h after light	7.94952	7.67267	8.22637
12 h after light	7.58237	7.42318	7.74156
4 h after dark	10.424466666666667	10.0092	11.0076
8 h after dark	20.179299999999998	19.6743	20.961
12 h after dark	18.1915	17.9221	18.4844