condition mean min max 4 h after light 2139.0 2139.0 2139.0 8 h after light 1968.3000000000002 1624.2 2312.4 12 h after light 1452.35 1322.9 1581.8 4 h after dark 1552.1999999999998 1263.6 1840.8 8 h after dark 2011.0 1615.9 2406.1 12 h after dark 3470.8 2691.0 4250.6