Comparison between the line luminosities derived using the relation by Bonato et al. (2019, B19, x-axis) with those derived with the relations by Gruppioni et al. (2016, blue solid lines) and Mordini et al. (in prep., red dashed lines). The contour lines indicate the 68%, 95%,  and 99.7% percentiles of the distribution. The three panels show three different lines: PAH at 3.3 μm (left), [Ne V] 14.32 μm (centre), and [O I] 63.18 μm (right). The relations may be different for AGN and star-forming dominated systems, as explained in the text.