condition	mean	min	max
0 h after light	15.5455	14.0575	17.0335
4 h after light	10.08773	8.49256	11.6829
8 h after light	17.667749999999998	17.4781	17.8574
4 h after dark	20.02465	16.7499	23.2994
8 h after dark	15.98885	15.4534	16.5243
12 h after dark	12.663599999999999	12.5362	12.791