condition	mean	min	max
4 h after light	17.5830335	16.922462	18.243605
8 h after light	20.4569605	20.23198	20.681941
12 h after light	17.668155499999997	17.092706	18.243605
4 h after dark	18.508155000000002	17.655929	19.360381
8 h after dark	20.3405525	18.243605	22.4375
12 h after dark	15.691681	15.691681	15.691681