condition mean min max 4 h after light 923.3 923.3 923.3 8 h after light 928.1 870.7 985.5 12 h after light 615.05 483.6 746.5 4 h after dark 563.0 447.8 678.2 8 h after dark 605.95 542.4 669.5 12 h after dark 768.7 686.5 850.9