condition mean min max 4 h after light 13.4589 12.7929 14.1249 8 h after light 15.3905 15.3551 15.4259 12 h after light 15.783249999999999 13.7648 17.8017 4 h after dark 17.5664 16.5298 18.3904 8 h after dark 18.94356666666667 15.7186 21.6731 12 h after dark 16.386733333333332 15.1936 17.8736