An LED lamp assembly includes a pair of LED lamps facing opposite directions. Each LED lamp includes a heat sink having a heat absorbing portion and a heat dissipating portion. The heat absorbing portion has opposite first and second surfaces. The heat dissipating portion extends rearwards from the first surface of the heat absorbing portion. An outmost end of the heat dissipating portion defines a plurality of apertures and is located beyond an outmost end of the heat absorbing portion. The heat dissipating portions of the heat sinks are oriented towards each other and define a channel therebetween. The LED modules are mounted at the second surfaces the heat absorbing portions. Heat generated by the LED modules is absorbed by the heat absorbing portions and then transferred to the apertures and the channel via the heat dissipating portions, from where the heat is dissipated to surrounding air.