condition mean min max 4 h after light 3113.7 3113.7 3113.7 8 h after light 2857.5 2571.0 3144.0 12 h after light 2854.45 2848.5 2860.4 4 h after dark 3187.25 2375.3 3999.2 8 h after dark 3454.3 3431.5 3477.1 12 h after dark 3014.75 2981.4 3048.1