Optical semiconductor lighting device

The present invention relates to an optical semiconductor lighting device. One embodiment includes an adjustment unit which is disposed between a housing having at least one semiconductor optical device and a casing receiving an SMPS, and which changes the height of the casing, and one embodiment has a position determination unit formed on a housing, on the undersurface of which a light-emitting module is mounted, which comprises at least one semiconductor optical device, in correspondence to the edge of the light-emitting module, and includes a heat dissipation unit on the top surface of the housing in correspondence to the light-emitting module, thereby enabling a significant reduction in transportation costs by reducing the space required for loading, enabling the design of a suitable layout structure for a semiconductor optical device used as a light source such that the device is accurately positioned, and simplifying the manufacturing process so as to enable fast mass production of product.