condition mean min max 4 h after light 8.6899765 8.6363 8.743653 8 h after light 8.0304475 7.376508 8.684387 12 h after light 10.023129999999998 8.684387 11.361873 4 h after dark 9.155816 8.684387 9.627245 8 h after dark 8.189688499999999 7.615045 8.764332 12 h after dark 8.781243 8.781243 8.781243