condition	mean	min	max
4 h after light	20.087699999999998	15.6402	24.5352
8 h after light	21.61985	21.1672	22.0725
12 h after light	16.82735	16.0068	17.6479
4 h after dark	21.9093	20.6809	23.1377
8 h after dark	19.25125	18.9269	19.5756
12 h after dark	21.4535	21.2261	21.6809