condition mean min max 4 h after light 649.529461 465.996185 833.062737 8 h after light 892.9355725 889.777845 896.0933 12 h after light 724.4203505 699.039601 749.8011 4 h after dark 628.054772 614.30898 641.800564 8 h after dark 319.74369 275.971932 363.515448 12 h after dark 303.225915 303.225915 303.225915