condition mean min max 4 h after light 1293.5 1293.5 1293.5 8 h after light 1284.3 1157.8 1410.8 12 h after light 1069.6 949.0 1190.2 4 h after dark 1680.8 1112.0 2249.6 8 h after dark 1389.8000000000002 1196.7 1582.9 12 h after dark 891.6 849.5 933.7