condition mean min max 4 h after light 739.2 739.2 739.2 8 h after light 679.95 678.3 681.6 12 h after light 757.05 658.0 856.1 4 h after dark 846.7 691.5 1001.9 8 h after dark 885.7 802.1 969.3 12 h after dark 956.05 799.1 1113.0