Patent ID: 7988335

Claim:
A lamp unit, comprising: a light-emitting module comprising a light source having a plurality of LEDs and a light penetrable cover defining a plurality of air venting holes therein; and a heat sink arranged above the light-emitting module, the heat sink comparing a elongated base and a plurality of fins formed on the base, the base having an outer convex surface formed at a top side thereof and an opposite inner concave surface formed at a bottom side thereof, the fins extending upwardly from the convex surface of the base, the concave surface defining an elongated recess extending along a longitudinal direction of the base, a light emitting window being defined between two opposite lateral sides of the base and located below the concave surface, the light source being received in the elongated recess of the base and thermally attached to the concave surface, the base of the heat sink defining a plurality of air exchanging holes through the convex surface and the concave surface, the light penetrable cover being located below of the light source, the light penetrable cover attached to the base, the light penetrable cover and the concave surface of the base cooperatively defining a chamber, air flowing into and out of the chamber via the venting holes of the light penetrable cover and exchanging holes of the base, heat generated by the LEDs of the light source being dissipated via the heat sink and via air flowing through the chamber, light emitted by the LEDs of the light source being guided to outside via the light penetrable cover.