MODERN INDUSTRIAL: the sleek design of the West Track Bar showcases a simple yet functional style that offers a unique lighting fixture to illuminate your home with trendy modern industrial flair CENTER SWIVEL BAR: the center swivel bar design lets you create different lighting options and styles for each room - be it a large room or small, you'll achieve the perfect light for any situation BULB REQUIREMENTS: 4x GU10 Bi-Pin Twist and Click 50W Bulbs (sold separately) - Compatible with LED, Incandescent and Halogen Bulbs - LED or Incandescent Bulbs Recommended PIVOTING TRACK HEADS: the pivoting track heads let you direct the light where you need it most providing the perfect lighting ambiance for every moment and every room DIMMABLE: fully dimmable with a compatible dimmer switch to create the perfect atmosphere (dimmer switch sold separately)