Patent ID: 8167466

Claim:
A lamp unit, comprising: a light-emitting module comprising a plurality of light sources; and a heat sink arranged above the light-emitting module, the heat sink comparing an elongated base and a plurality of fins formed on the base, the base having an outer substantially convex surface formed at a top side thereof and an opposite inner concave surface formed at a bottom side thereof, the fins extending outwardly from the convex surface of the base, the concave surface defining an elongated recess extending along an axial direction of the base, a light emitting window being defined between two opposite lateral sides of the base and below the concave surface, the light sources being received in the elongated recess of the base and thermally attached to the concave surface, the heat sink defining a plurality of air exchanging holes through the convex surface and the concave surface of the base thereof, heat generated by the light sources being dissipated via the heat sink, light emitted by the light sources being guided to outside via the light emitting window.