condition mean min max 4 h after light 59.4918 56.0341 62.9495 8 h after light 52.1559 51.5422 52.7696 12 h after light 62.99065 60.338 65.6433 4 h after dark 72.58425 72.5441 72.6244 8 h after dark 73.3031 68.6886 77.9176 12 h after dark 75.6591 74.6141 76.7041