condition	mean	min	max
0 h after light	9.300985	8.88446	9.71751
4 h after light	7.54718	7.04072	8.05364
8 h after light	7.20628	7.10577	7.30679
4 h after dark	7.14815	7.06521	7.23109
8 h after dark	8.40608	8.26379	8.54837
12 h after dark	8.28026	7.78868	8.77184