condition mean min max 4 h after light 4.54868 2.83621 6.26115 8 h after light 2.892835 2.53639 3.24928 12 h after light 6.764265 5.71686 7.81167 4 h after dark 10.418975 8.35955 12.4784 8 h after dark 9.37299 8.18628 10.5597 12 h after dark 7.48822 6.27246 8.70398