Patent ID: 7942557

Claim:
An LED lamp comprising: a heat sink comprising a base plate defining an air intake adjacent to an end of the base plate and plurality of fins extending downwardly from a bottom surface of the base plate, a plurality of air passages defined between every two neighboring ones of the fins and extending from the air intake to another opposite end of the base plate; a centrifugal blower mounted on the bottom surface of the base plate and located between the air intake and the air passages; a plurality of LED modules fixed on a top surface of the base plate; and a housing engaging with the base plate to enclose the centrifugal blower and the fins therein and cooperating with the base plate to define an exhaust port between the another opposite end of the base plate remote from the air intake and a corresponding sidewall of the housing; wherein the housing comprises a covering plate and four sidewalls extending upwardly from four side edges of the covering plate and surrounding the fins and the centrifugal blower; wherein top edges of the sidewalls of the housing are fixed to corresponding edges of the base plate, except a top edge of a short one of the sidewalls remote from the centrifugal blower, which projects outside a corresponding side edge of the base plate to thereby define the exhaust port between the short one of the sidewalls remote from the centrifugal blower and the corresponding side edge of the base plate; a covering member fixed on the top surface of the base plate, located between the air intake and the exhaust port and covering the LED modules therein.