condition mean min max 4 h after light 251.6 251.6 251.6 8 h after light 324.7 196.1 453.3 12 h after light 633.45 399.6 867.3 4 h after dark 876.35 746.7 1006.0 8 h after dark 599.3 539.1 659.5 12 h after dark 405.35 335.1 475.6