condition	mean	min	max
0 h after light	20.6089	18.5991	22.6187
4 h after light	10.63805	9.473	11.8031
8 h after light	4.420615	3.78293	5.0583
4 h after dark	13.17035	12.5182	13.8225
8 h after dark	13.04165	12.4162	13.6671
12 h after dark	20.1754	17.5788	22.772