A fitter bolt bracket is provided for holding a luminaire to a luminaire support. The bracket comprises an elongated metal piece having a base section joining two raised edge sections, with the bracket having a channel shaped cross section. The raised edge sections each have a cut out portion, and the base section has two holes one near either end. The bracket holes are aligned with two laterally and longitudinally offset holes in the upper housing of the luminaire. The cut out portion of the raised edge section are axially aligned with a tubular luminaire support. The bracket is held to the upper housing by two bolts each one passing through one hole in the bracket and threading into the corresponding hole in the upper housing.