condition mean min max 4 h after light 1828.457591 1699.120597 1957.794585 8 h after light 1679.8572785000001 1598.529841 1761.184716 12 h after light 1950.864147 1904.765468 1996.962826 4 h after dark 1720.1657409999998 1448.001288 1992.330194 8 h after dark 1535.9096395000001 1248.006405 1823.812874 12 h after dark 2422.27302 2422.27302 2422.27302