Peak Lyα luminosity density vs. bolometric luminosity of the targeted quasars. The same symbols as Figure 2 indicate the bolometric luminosity of the quasar, which is is computed using the monochromatic luminosity L_λ(1350 Å) (see Appendix B). Systems where no Lyα nebulae were detected are marked with a white dot (see Section 3.2). The dashed red line represents a power law fit to the data of the form $log(L_{\mathrm{Ly}\alpha ;\mathrm{QSO}}^{\mathrm{peak}}/{\mathrm{erg}\mathrm{s}}^{-1}{\mathrm{\AA }}^{-1})=8.96+0.73log(L_{\mathrm{bol}}/{\mathrm{erg}\mathrm{s}}^{-1})$.