Low voltage single lamp fixture is aimable 360 degree in the horizontal plane and reflector rotates 360 degrees in the vertical plane. Both adjustments can be locked in position by loosening set screws and tightening at desired aiming angle. 10W 12V T3 Halogen or Xelogen G4 (included with fixture). Stainless steel housing composed of three parts: lamp support( stem), lampholder (socket), and reflector (shade).