condition mean min max 4 h after light 706.2 706.2 706.2 8 h after light 595.4 502.7 688.1 12 h after light 586.55 539.5 633.6 4 h after dark 927.9 758.8 1097.0 8 h after dark 1045.6 1022.4 1068.8 12 h after dark 1358.6 1157.5 1559.7