Direct-Lighting 50012 White MR16 Square Low Voltage Track Lighting Head 50W MR16 steel stamping track head with polycarbonate transformer case MR16 GU5.3 ceramic socket 50W Max. Halogen or LED bulb ( BULB NOT INCLUDED) H System configuration, can be compatible with H type 3-wire-1 circuit track system Integral electronic transformer and MR16 lens holders are included. UL Listed. Rated for Indoor use or Dry locations. Installation Video: http://youtu.be/QpwIEEQFJwg