condition mean min max 4 h after light 9.193535 8.27037 10.1167 8 h after light 7.3727599999999995 6.54611 8.19941 12 h after light 2.9514050000000003 2.8586 3.04421 4 h after dark 1.2482989999999998 0.975328 1.52127 8 h after dark 0.3790055 0.297359 0.460652 12 h after dark 0.8957985 0.835312 0.956285