condition mean min max 4 h after light 1820.2 1820.2 1820.2 8 h after light 1572.2 1196.2 1948.2 12 h after light 1350.5 1301.2 1399.8 4 h after dark 1287.35 1229.4 1345.3 8 h after dark 1276.95 921.5 1632.4 12 h after dark 1181.4 1036.2 1326.6