Summit series track and rail heads are the perfect replacements for halogen MR16''s as they offer lower wattage with superior lumen output, over 10 times the rated life span, less maintenance, no projected heat, and BeamShift technology in-field changeable beam angle. All Summit series track luminaires are equipped with BeamShift technology, allowing in-field modification of beam angle with no additional tools or accessories simply by changing the location of the lens. For use with 120V track. Track Fixture is available in H, J/J2, and L track configurations. Order according to track layout specifications.