Lyα halo flux fraction X_Lyα,halo as a function of Lyα halo and UV continuum scale lengths (second and third panel, respectively) and against total Lyα luminosity (right panel). The first panel shows the X_Lyα,halo distribution (objects without HST detection and with upper limit on their Lyα halo scale length are not included). The median value (0.65) is indicated by the black dashed line. Upper limits on the scale lengths are indicated by arrows. W16 measurements are indicated by the black points. Spearman rank correlation coefficients ρ_s and corresponding p₀ values for our results (excluding upper limits) and those of W16 are shown in each panel.