condition mean min max 0 h after light 19.1082 18.1579 20.0585 2 h after light 6.026035 5.92925 6.12282 4 h after light 7.759105 7.61979 7.89842 8 h after light 9.935765 8.02793 11.8436 12 h after light 12.63705 12.3367 12.9374 2 h after dark 17.2745 13.3505 21.1985 4 h after dark 19.5051 17.1099 21.9003 8 h after dark 23.935499999999998 23.0264 24.8446 12 h after dark 21.887999999999998 21.6629 22.1131