condition	mean	min	max
0 h after light	18.82875	18.4915	19.166
4 h after light	10.915849999999999	10.3542	11.4775
8 h after light	13.74175	13.4212	14.0623
4 h after dark	18.98735	18.8866	19.0881
8 h after dark	20.070349999999998	19.6363	20.5044
12 h after dark	15.81955	15.5818	16.0573