condition	mean	min	max
4 h after light	15.882449999999999	13.1593	18.6056
8 h after light	18.59525	17.1056	20.0849
12 h after light	17.2891	15.7877	18.7905
4 h after dark	8.39485	7.99322	8.79648
8 h after dark	4.424415	3.39608	5.45275
12 h after dark	9.359884999999998	6.99607	11.7237