condition mean min max 4 h after light 1008.2 1008.2 1008.2 8 h after light 913.9 853.0 974.8 12 h after light 585.65 354.5 816.8 4 h after dark 327.8 221.5 434.1 8 h after dark 352.3 288.0 416.6 12 h after dark 398.4 375.3 421.5