condition mean min max 0 h after light 1.07234 1.01208 1.1326 4 h after light 0.748273 0.593623 0.902923 8 h after light 0.665282 0.254694 1.07587 4 h after dark 0.961143 0.742526 1.17976 8 h after dark 1.625215 1.32797 1.92246 12 h after dark 0.88931 0.5933 1.18532