condition mean min max 0 h after light 7.65379 7.64515 7.66243 4 h after light 34.88385 32.8083 36.9594 8 h after light 64.39675 59.8211 68.9724 4 h after dark 17.788400000000003 16.902 18.6748 8 h after dark 12.11585 12.0903 12.1414 12 h after dark 13.257935 7.81747 18.6984