condition mean min max 4 h after light 685.973 684.526 687.42 8 h after light 503.615 476.749 530.481 12 h after light 534.5615 516.094 553.029 4 h after dark 683.541 648.844 718.238 8 h after dark 876.733 858.359 895.107 12 h after dark 807.1659999999999 805.599 808.733