condition mean min max 3 h after light 91.462 87.4647 96.6319 6 h after light 77.3637 69.9023 84.3562 9 h after light 76.7145 71.1341 81.9497 12 h after light 78.8254 72.3293 87.8848 3 h after dark 118.72233333333334 115.798 123.205 6 h after dark 93.62636666666667 92.7791 94.9322 9 h after dark 92.49116666666667 86.8302 97.5068 12 h after dark 92.15296666666667 87.3753 95.5785