condition mean min max 4 h after light 429.6 429.6 429.6 8 h after light 572.5 490.8 654.2 12 h after light 1125.65 600.8 1650.5 4 h after dark 2044.15 1852.8 2235.5 8 h after dark 2479.65 2417.9 2541.4 12 h after dark 2109.7 1342.7 2876.7