condition mean min max 0 h after light 3.671705 3.27786 4.06555 4 h after light 7.890095 7.31597 8.46422 8 h after light 5.749905 5.32278 6.17703 4 h after dark 6.64169 5.84838 7.435 8 h after dark 6.605230000000001 5.22675 7.98371 12 h after dark 5.035435 3.81904 6.25183