Lighting device

The utility model discloses a lighting device, including casing, connection the optical element of casing, by the cooperation of casing and optical element forms accepts the chamber, be located accept the light source subassembly and the drive power supply subassembly of intracavity, lighting device is still including being located accept the intracavity and run through casing and optical element's passageway, the passageway is with its inside and outside intercommunication. The heat that this lighting device light sources inside subassembly sent can carry out effective, quick heat dissipation through above -mentioned passageway, need not to set up in addition radiator part, has reduced lighting device's cost and weight. 本实用新型公开了种照明装置，包括壳体、连接所述壳体的光学元件、由所述壳体与光学元件配合形成的收容腔、位于所述收容腔内的光源组件和驱动电源组件，所述照明装置还包括位于所述收容腔内并贯穿所述壳体和光学元件的通道，所述通道将其内部与外部连通。该照明装置内光源组件发出的热量可以通过上述通道进行有效、快速的散热，无需另外设置散热元件，降低了照明装置的成本及重量。