condition mean min max 4 h after light 3749.1 3749.1 3749.1 8 h after light 3337.65 2094.3 4581.0 12 h after light 1522.65 752.5 2292.8 4 h after dark 1351.5 899.4 1803.6 8 h after dark 2009.85 1969.0 2050.7 12 h after dark 2726.8 2315.1 3138.5