condition	mean	min	max
4 h after light	7.360635	6.1098	8.61147
8 h after light	17.9514	15.863	20.0398
12 h after light	18.652549999999998	17.5879	19.7172
4 h after dark	19.66195	18.7951	20.5288
8 h after dark	14.6524	14.0783	15.2265
12 h after dark	15.3712	12.671	18.0714