condition	mean	min	max
4 h after light	12.0892	12.0044	12.174
8 h after light	16.8381	15.1489	18.5273
12 h after light	7.427825	6.72053	8.13512
4 h after dark	6.339993333333333	5.94261	7.097
8 h after dark	3.55575	3.50863	3.62219
12 h after dark	7.854216666666667	6.04885	9.18245