Patent ID: 8434917

Claim:
An indoor illuminating device comprising: at least one lamp comprising a heat sink and a light emitting portion; and a housing comprising a top wall and a bottom wall opposite to the top wall, the bottom wall defining at least one opening corresponding to the at least one lamp, the heat sink of the at least one lamp being received in the housing, and the light emitting portion of the at least one lamp exposing out of the housing through the at least one opening, the housing further defining a first ventilation opening and a second ventilation opening, the heat sink of the at least one lamp being disposed in an airflow path between the first ventilation opening and the second ventilation opening; wherein the light emitting portion comprises at least one light emitting component, and the heat sink comprises a base and a plurality of fins, the base comprises a first surface facing the light emitting portion and a second surface opposite to the first surface, the at least one light emitting component is mounted on the first surface of the base, and the plurality of fins are formed on the second surface of the base; and wherein the heat sink further comprises a hollow post formed on the second surface of the base, and the plurality of fins are arranged surrounding the hollow post.