This Hampton Bay Linear Track Lighting Head provides an abundance of light and sophistication to your interior space. It features a multi-directional lamp head to provide light to difficult places where light does not reach. A linear track section and power supply is required (sold separately) or use as an add-on to a Hampton Bay Linear, Commercial Electric or H/EC (3 BUS) track lighting system you already have. Has a medium based socket for use with a multitude of different types of light bulbs (sold separately). Truly a Universal light fixture.