condition	mean	min	max
4 h after light	18.789837499999997	17.052455	20.52722
8 h after light	15.331707000000002	14.130528	16.532886
12 h after light	20.064975	16.395164	23.734786
4 h after dark	13.6032485	12.866375	14.340122
8 h after dark	13.360365	10.312043	16.408687
12 h after dark	23.434517	23.434517	23.434517