condition	mean	min	max
0 h after light	17.3437	17.274	17.4134
4 h after light	13.45115	13.2559	13.6464
8 h after light	21.38395	19.3496	23.4183
4 h after dark	20.4982	18.7783	22.2181
8 h after dark	16.00965	15.4692	16.5501
12 h after dark	14.2484	13.5918	14.905