condition mean min max 4 h after light 7.7851 2.40918 18.1994 8 h after light 4.770078666666667 0.529606 10.6825 12 h after light 6.918083333333334 3.54268 11.7456 4 h after dark 7.60754 3.94115 13.4589 8 h after dark 5.415116666666667 4.02181 6.47402 12 h after dark 6.22867 6.06713 6.52539