condition mean min max 4 h after light 14.8197165 13.912889 15.726544 8 h after light 15.167554 15.167554 15.167554 12 h after light 14.266570999999999 13.955256 14.577886 4 h after dark 17.6160975 16.417913 18.814282 8 h after dark 15.599479500000001 15.562542 15.636417 12 h after dark 13.795167 13.795167 13.795167