condition mean min max 4 h after light 50.1434 44.3905 55.8963 8 h after light 18.38945 17.9135 18.8654 12 h after light 9.78789 9.56878 10.007 4 h after dark 11.5166 10.7873 12.2834 8 h after dark 17.925433333333334 15.9612 21.0991 12 h after dark 36.21596666666667 33.6064 37.6919