The bullhorn make is intended to be used when two fixtures are placed at the top of a pole tenon. All structural fasteners are galvanized high strength carbon steel which holds two fixtures in 180° orientation and swivels about the tenon axis. This bracket is appropriate when the power assembly is mounted below the fixtures. The metal halide lights offer most dazzling level of light output. This bulb will work with a standard magnetic ballast or electronic ballast and resists heat and corrosion.