condition	mean	min	max
0 h after light	12.322244999999999	6.15289	18.4916
4 h after light	0.0	0.0	0.0
8 h after light	12.262635	6.26327	18.262
4 h after dark	6.0429	0.0	12.0858
8 h after dark	9.140815	6.05983	12.2218
12 h after dark	15.22775	12.0216	18.4339