Optical semiconductor lighting apparatus

An optical semiconductor lighting apparatus comprising:

• a housing comprising a first end portion and an opposing second end portion, wherein the first and second end portions comprise an upper cover and a case body coupled to the upper cover, respectively;
• a light source module disposed inside the housing;
• a fan disposed inside the housing and adjacent to the light source module, wherein the fan rotates in a first direction to blow air toward the light source module;
• and
• a reflector disposed adjacent to the second end portion of the housing, wherein:
• the reflector comprises a first surface configured to reflect light emitted from the light source module and an opposing second surface that is exposed to ambient air;
• and
• the reflector is coupled to the second end portion of the housing with an outer vent formed therebetween,
• wherein the housing at least partially defines an inlet passage along which air is drawn between the first and second end portions of the housing by the fan, moved past the light source, and exhausted from the housing through the outer vent and elected over the second surface of the reflector, when the fan moves in the first direction;
• wherein the light source module comprises:
• a printed circuit board comprising a vent forming a portion of the moving path;
• and
• at least one optical semiconductor element mounted on the printed circuit board;
• wherein the vent comprises:
• a middle vent formed through a center portion of the printed circuit board;
• and
• a peripheral vent formed at an peripheral portion of the printed circuit board.