condition	mean	min	max
4 h after light	9.97311	8.90332	11.0429
8 h after light	8.13127	7.24571	9.01683
12 h after light	8.790445	7.51239	10.0685
4 h after dark	17.29355	14.7863	19.8008
8 h after dark	15.4375	15.0262	15.8488
12 h after dark	11.62424	9.76888	13.4796