condition mean min max 0 h after light 9.317285 9.16202 9.47255 4 h after light 16.9906 14.5922 19.389 8 h after light 18.193350000000002 17.3154 19.0713 4 h after dark 11.710745 8.01769 15.4038 8 h after dark 14.0127 10.643 17.3824 12 h after dark 9.03096 8.03242 10.0295