An LED-based luminaire includes a driver configured to convert line voltage into a desired power configuration. Elongate fasteners attach one or more LED-based lighting modules to a mount member and also to energized poles of the power driver. The fasteners communicate electrical energy from the power driver to the lighting module. In one embodiment, the mount member functions as a heat sink, and it includes a bumpy surface coating having a texture with sufficient feature heights to enhance heat transfer between the heat sink and the surrounding environment.