condition mean min max 4 h after light 18.3774 18.2018 18.553 8 h after light 48.16825 47.2008 49.1357 12 h after light 73.57475 63.0614 84.0881 4 h after dark 63.23063333333333 59.4073 67.6476 8 h after dark 48.99283333333334 48.2775 49.5235 12 h after dark 29.6137 27.9933 31.5372