Light affects human health, physiology, comfort, productivity and mental well-being. Current LED lamps can reach around 200 lm·W-1 but either sacrifice some colour fidelity for extra efficacy or provide the orange–red part of the spectrum with doped fluoride or nitride phosphors, which demand harsh or costly synthesis conditions. In addition, to improve the colour uniformity cast by the lamps, visible–light diffusers are blended in the resin containing the phosphors. With one of the first microLED fabs starting manufacturing next year, ams Osram is opening the way to the miniaturisation of components in the domain of lighting. These smaller-sized chips should be complemented with small-sized phosphors. The system proposed consists of Y3Al5O12 garnet shells (YAG) doped with Eu3+ ions covering nanospheres of SiO2. The sharp f-f transitions of Eu3+ ions cover the orange and red parts of the spectrum. In the present work, the Stöber process was used to synthesise monodisperse spheres with diameters in the range of 400-800 nm, suitable for scattering visible light. The shells with a thickness of a few tens of nm were synthesised by a sol-gel derived Pechini process. The green and yellow components of the spectrum were introduced by nanocrystalline YAG:Ce3+ also synthesised by the Pechini method. The prepared doped structures can be used in combination with a blue InGaN LED for the emission of a high-quality white light.