Silo X20 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. All Silo X20 series track luminaires are equipped with BeamShift technology, allowing continuous in-field modification of beam angle from spot to flood. For use with 120V track. Track Fixture is available in H, J/J2, and L track configurations. Order according to track layout specifications. Features How to create your Track or Rail layout: Select your light source(s) Select your type of track:J Single Circuit Track with End CapsJ2 Two Circuit Track with End CapsH Single Circuit Track with End CapsL Single Circuit Track with End Caps Select your track accessories to build the track layout:J Track Single Circuit AccessoriesJ2 Track Two Circuit AccessoriesH Track Single Circuit AccessoriesL Track Single Circuit Accessories