Abstract: A light emitting diode (LED) luminaire includes: a heat dissipating module having a heat conductive portion and a plurality of heat dissipating fins disposed on the heat conductive portion, the outer surfaces of the heat dissipating fins having a plurality of titanium nanoparticles disposed thereon for increasing the heat dissipating surface area of the heat dissipating fins per unit volume occupied thereby; at least a substrate provided with a plurality of LEDs thereon and disposed on the heat conductive portion so as for the at least a substrate to be opposite the heat dissipating fins; and at least a light-permeable cover disposed on and covering the substrate, the light-permeable cover having a plurality of concave portions to accommodate the LEDs of the substrate, respectively, so as to diffuse light emitted from the LEDs, thereby achieving uniform illumination over a large area.