A luminaire comprises a light fixture that includes a housing. The housing includes a light emitting diode (LED) light source and a back wall that has a first surface shape. The luminaire further comprises a mounting system that includes a tie rod that has a first end that includes a plurality of teeth. The mounting system also includes a mounting plate rotatably coupled to the tie rod. The mounting plate is coupled to the back wall of the housing. The mounting plate has a second surface shape, where the first surface shape and the second surface shape are substantially the same.