condition mean min max 4 h after light 5592.6 5592.6 5592.6 8 h after light 5020.65 3325.3 6716.0 12 h after light 3069.05 2232.6 3905.5 4 h after dark 1821.45 1065.1 2577.8 8 h after dark 1980.9 1343.5 2618.3 12 h after dark 4258.9 3374.2 5143.6