Direct-Lighting 50154 Black GU10 Line Voltage Track Lighting Head - No Bulb 120V GU10 base twist and turn typed Track Lighting Fixture - No Bulb 50W Max. Halogen / LED bulb. ( BULB NOT INCLUDED). Max LED bulb length (measure from bulb face to end of the pin is 2-1/8 inch) H type compatible with H type 3-wire-1 circuit track system. ( 3 metal tips. 2 tips on 1 side and 1 tip on the other side. 15/16-inch if measure from tip to tip) 180 horizontal rotation or 90 vertical project. UL Listed. Rated for Indoor use or Dry locations. Installation Video: http://youtu.be/QpwIEEQFJwg