condition mean min max 4 h after light 10.067187 9.29888 10.835494 8 h after light 8.378452 7.755727 9.001177 12 h after light 9.4230395 8.644128 10.201951 4 h after dark 8.697173 8.438331 8.956015 8 h after dark 9.3849905 9.29888 9.471101 12 h after dark 9.213926 9.213926 9.213926