condition mean min max 4 h after light 472.8 472.8 472.8 8 h after light 487.1 430.2 544.0 12 h after light 775.55 498.4 1052.7 4 h after dark 967.45 891.2 1043.7 8 h after dark 858.95 856.6 861.3 12 h after dark 796.05 777.9 814.2