condition mean min max 4 h after light 2588.9 2588.9 2588.9 8 h after light 2344.55 1911.0 2778.1 12 h after light 1960.8 1817.5 2104.1 4 h after dark 1832.15 1673.5 1990.8 8 h after dark 1891.9 1744.1 2039.7 12 h after dark 2243.75 1902.0 2585.5