condition	mean	min	max
4 h after light	15.38605	13.7533	17.0188
8 h after light	15.5347	14.5325	16.5369
12 h after light	18.01015	17.5018	18.5185
4 h after dark	19.62825	18.1134	21.1431
8 h after dark	15.95995	15.5889	16.331
12 h after dark	15.16455	14.7074	15.6217