condition	mean	min	max
4 h after light	14.79604	8.43152	21.8183
8 h after light	12.034173333333333	4.04462	18.8326
12 h after light	13.613203333333333	8.10291	21.0453
4 h after dark	18.3966	11.1707	22.7377
8 h after dark	19.3182	13.8318	23.0379
12 h after dark	20.570233333333334	19.9075	20.9998