condition mean min max 4 h after light 3.32982 2.28747 4.37217 8 h after light 3.540615 3.02708 4.05415 12 h after light 4.70823 4.38222 5.03424 4 h after dark 10.344595 9.27629 11.4129 8 h after dark 5.725275 5.03026 6.42029 12 h after dark 5.299925 4.96918 5.63067