condition mean min max 4 h after light 1426.5 1426.5 1426.5 8 h after light 1349.4 1327.3 1371.5 12 h after light 1200.65 1032.8 1368.5 4 h after dark 1868.75 1102.0 2635.5 8 h after dark 2737.7 2696.5 2778.9 12 h after dark 2545.0 2539.9 2550.1