condition mean min max 0 h after light 7.41359 6.72991 8.09727 2 h after light 2.9308 2.5282 3.3334 4 h after light 4.74175 4.65661 4.82689 8 h after light 5.405735 4.85493 5.95654 12 h after light 7.6962 7.65381 7.73859 2 h after dark 10.28099 8.64078 11.9212 4 h after dark 9.818225 9.36955 10.2669 8 h after dark 9.970275 9.79595 10.1446 12 h after dark 7.579765 7.18382 7.97571