Patent ID: 8491156

Claim:
A lighting device, comprising: a housing having a first plate portion and a first shell portion, the first plate portion being disposed at one end of the first shell portion, wherein a cavity is defined by the first shell portion and the first plate portion; a heat sink having an inner sidewall and being disposed over the housing, the first shell portion being spaced apart and encircled by the inner sidewall, wherein a first compartment is defined by the first shell portion, the first plate portion, and the inner sidewall; a cover having a second plate portion, a first extension portion, and a second extension portion, the second extension portion being spaced apart and encircled by the first extension portion, the second plate portion being disposed at one end of the first extension portion and the second extension portion, wherein a second compartment is defined by the second plate portion, the first extension portion, the second extension portion, and the heat sink; and a light source module disposed in the cavity and having a circuit board, wherein a plurality of first thru-holes are formed on the circuit board, a plurality of third thru-holes are formed on the second plate portion, a plurality of fourth thru-holes are formed on the first shell portion, a plurality of fifth thru-holes are formed on the first plate portion, wherein the fifth thru-holes and the first thru-holes are overlapped with each other, wherein the third thru-holes and fourth thru-holes are in communication with each other to allow air flowing through the first compartment and the second compartment, the fifth thru-holes and fourth thru-holes are in communication with each other so as to allow air flowing through the cavity.