Previously, SiO2 particles (1-10 wt%, <10 𝜇m) were proposed to augment the light flux and correlated color temperature (CCT) deviation in conventional blue-excited LEDs. This research paper explores the application of larger SiO2 particle sizes within a conventional LED model. SiO2 particles with diameters ranging from 1 𝜇m to 20 𝜇m were analyzed for their scattering properties usingtheStobermethod,Mie-scattering-basedMATLABprogramandLightToolssoftwaretosimulateopticalattributesofaphosphor transmuted WLED apparatus with XRD, SEM, and so on. SiO2 was integrated into the yellow phosphor YAG:Ce layer to induce scattering phenomena within the active layer. Through our investigation, the concentrations of SiO2 and YAG:Ce phosphor were consistently maintained at 5 and 10 wt.%, respectively. Our findings focus on assessing backward scattering with larger SiO2 sizes. Modulating the sizes of SiO2 spheres reduced CCT deviation and enhanced both flux output and color rendering performance. These results emphasize the potential utility of larger SiO2 particles in enhancing white LED performance and facilitate further investigation to optimize their useability in production processes