Fraction of light in IGL compared to the total group light (f_IGL) of our KiDS+GAMA group sample at 0.09 < z < 0.15 in the narrow bins of the CG galaxy they were stacked. The values along the x-axis indicate the mean M_r of the corresponding bins. Pink, yellow, and cyan shaded regions show the upper and lower limit of f_IGL for the zeroth- (p₀), first- (p₁), and second- (p₂) order background-subtracted images, respectively. Here, the p₀ measurement is the upper limit of f_IGL for each magnitude bin at this redshift bin, while p₁ and p₂ measurements provide a lower limit. Details on how we define the upper and lower limits for each of the measurements are discussed in the text. The dotted and dashed lines show the effect of the PSF on the measurements at redshifts 0.1 and 0.3 from the Hydrangea simulations.