Logarithm of the X-rays luminosity in the 2–10 keV band versus [O III] luminosity (both in erg s^-1) measured from ground-based (left) and HST observations (middle), and (right) only for objects with direct [O III] HST measurements. Type 1 LINERs shown with red circles, type 2 objects shown with black circles. The objects for which the [O III] luminosity is derived from the [N II] measurements are marked with smaller green circles. The squares are the RL LINERs. The circles surround objects where L_X is corrected for local aborption. In the central and right panel, the solid lines represent the best linear fit. The dashed red line in the central panel is the correlation found for Seyferts by Panessa et al. (2006).