A high brightness LED apparatus with an integrated heat sink includes a heat sink base and at least one LED mounted in the heat sink base. The heat sink base includes multiple dissipating fins formed integrally on the substrate. Each of the at least one LED includes a body and multiple dies. The body is mounted in the substrate and includes a conductive seat with a top recess. The dies are mounted on the conductive seat in the top recess and produce a great amount of light beams for an enhanced brightness of illumination. The dissipating fins will efficiently dissipate heat produced by the at least one LED to prevent each LED from brightness decay and extend the useful life of each LED.