condition	mean	min	max
4 h after light	19.971400000000003	19.2327	20.7101
8 h after light	17.021	16.5967	17.4453
12 h after light	18.84215	18.6039	19.0804
4 h after dark	18.567950000000003	17.6214	19.5145
8 h after dark	17.9943	17.3769	18.6117
12 h after dark	18.61395	17.7593	19.4686