condition mean min max 0 h after light 2.546795 1.69988 3.39371 4 h after light 4.2478 4.03426 4.46134 8 h after light 4.1096 3.74247 4.47673 4 h after dark 5.842715 5.01933 6.6661 8 h after dark 3.49338 2.80879 4.17797 12 h after dark 3.628515 3.38915 3.86788