Lytepan Par-Tech Low Profile track head is designed specifically for PAR lamps. Made of die-cast aluminum and vented for cool operation. Finish available in Matte White or Matte Black. One R20, R30, PAR16, PAR20, PAR30 or PAR38 medium base lamp is required, but not included. Incandescent and halogen dimmable with a standard incandescent dimmer. UL listed. 2.1 inch diameter x 3.1 inch length. Requires an accessory shade, sold separately. Compatible with Lytespan Basic 1-circuit, Advent 1 or 2 circuit, and Radius 1-circuit track systems. Requires shade accessory, sold separately.