condition mean min max 4 h after light 1866.8 1866.8 1866.8 8 h after light 1741.75 1636.2 1847.3 12 h after light 1729.0 1650.6 1807.4 4 h after dark 1774.0 1724.8 1823.2 8 h after dark 2184.8 2035.9 2333.7 12 h after dark 2323.2 2282.6 2363.8