Illuminating apparatus having heat dissipation base and multilayer array-type led module

An illuminating apparatus, comprising:

• a polygonal shaped pillar constituted of a plurality of heat dissipation bases, each of the heat dissipation bases comprising an upper end surface and a lower end surface, and each of the upper end surface and the lower end surface comprising a locking hole, wherein each heat dissipation base comprises a light outputting surface facing outwardly, and a light outputting slot configured at the light outputting surface, wherein an embedding slot is configured between an upper surface of the light outputting slot and the surface of the heat dissipation base, wherein the heat dissipation base comprising a plurality of heat dissipation through holes distributed around the light outputting slot, wherein the heat dissipation through holes are configured through the heat dissipation base along at least a horizontal direction and a vertical direction, respectively, and the heat dissipation through holes configured through the heat dissipation base along the horizontal direction are communicated with the heat dissipation through holes configured through the heat dissipation base along the vertical direction;
• two retaining plates, adapted for assembling to secure the heat dissipation bases, wherein each retaining plate comprises a plurality of through holes, each of the through holes is positionally corresponding to one of the locking hole of the heat dissipation bases for locking with the corresponding heat dissipation base thereby, and the two retaining plates are adapted for jointly securing at least one lamp element thereto;
• at least one LED module, mounted on a bottom of the light outputting slot;
• and
• a lens, embedded in the embedding slot.