A high bay luminaire system and method for forming the same includes a body member, a power supply, and a light source. The body member includes a plurality of end sections, a plurality of intermediate sections which may be attached to the plurality of end sections, a central section which is positioned between the plurality of intermediate sections and is attached to the plurality of end sections, and a plurality of side sections which are attached to an end section of the plurality of end sections and/or an intermediate section of the plurality of intermediate sections. The light source is in electrical communication with the power supply. The cavity is defined by the plurality of end sections and the central section. The plurality of end sections, the plurality of intermediate sections, the central section, and/or the plurality of side sections are formed of sheet metal.