condition mean min max 4 h after light 1538.9 1538.9 1538.9 8 h after light 1602.35 1503.4 1701.3 12 h after light 1631.2 1579.5 1682.9 4 h after dark 2079.15 1811.5 2346.8 8 h after dark 1932.6 1915.0 1950.2 12 h after dark 1803.3000000000002 1781.7 1824.9