condition mean min max 4 h after light 6.970903333333333 4.87443 8.22237 8 h after light 6.78181 2.69116 10.8834 12 h after light 5.6445533333333335 3.60728 7.10454 4 h after dark 7.03846 6.37346 7.55302 8 h after dark 5.05471 4.63428 5.49344 12 h after dark 2.84852 2.59038 3.08586