condition mean min max 4 h after light 269.1 269.1 269.1 8 h after light 270.0 184.9 355.1 12 h after light 479.4 210.3 748.5 4 h after dark 621.3 589.9 652.7 8 h after dark 441.85 379.1 504.6 12 h after dark 277.45 198.0 356.9