An LED lamp includes a housing, an LED module, a fixing bracket and a power driver source. The housing includes a base plate and first and second sidewalls extending downwardly from two opposite edges of the base plate, respectively. A light emitting window is defined between free, bottom ends of the first and the second sidewalls and located under the base plate. The base plate has a heat absorbing surface facing the light emitting window and a heat dissipating surface opposite to the heat absorbing surface. A plurality of fins are provided on the heat dissipating surface of the base plate. The LED module, which is received in the housing and mounted on the heat absorbing surface of the base plate, faces the light emitting window. The fixing bracket is mounted on the housing and located above the base plate of the housing.