condition mean min max 4 h after light 1980.0 1980.0 1980.0 8 h after light 2912.55 2487.8 3337.3 12 h after light 3843.7000000000003 2849.8 4837.6 4 h after dark 2939.3 1984.3 3894.3 8 h after dark 2602.8999999999996 2390.6 2815.2 12 h after dark 2359.85 1948.7 2771.0