condition	mean	min	max
4 h after light	17.333801	15.094519	19.573083
8 h after light	18.087421499999998	17.745523	18.42932
12 h after light	16.930268499999997	16.224714	17.635823
4 h after dark	17.8577955	16.235956	19.479635
8 h after dark	18.5148425	18.464642	18.565043
12 h after dark	21.120532	21.120532	21.120532