condition mean min max 4 h after light 6.782735000000001 5.94207 7.6234 8 h after light 7.411795 7.35776 7.46583 12 h after light 8.750845 8.08003 9.42166 4 h after dark 8.733953333333334 8.4917 8.93826 8 h after dark 9.109533333333333 8.76885 9.76467 12 h after dark 6.100003333333333 5.3598 6.6885