condition mean min max 4 h after light 1804.5366666666666 1723.046667 1865.45 8 h after light 1773.3155553333334 1635.85 1896.663333 12 h after light 1638.588889 1500.003333 1783.326667 1.5 h after dark 1603.187778 1480.33 1780.816667 5.5 h after dark 1848.17 1727.536667 1946.62 9.5 h after dark 1756.6399996666667 1648.703333 1854.593333