condition mean min max 0 h after light 9.44483 9.36879 9.52087 4 h after light 11.3494 11.1524 11.5464 8 h after light 11.3352 10.6831 11.9873 4 h after dark 12.72105 12.7018 12.7403 8 h after dark 11.094100000000001 10.6466 11.5416 12 h after dark 10.225295 9.62609 10.8245