A 3-way rotary socket witch controls a bulb up to 150W or an equivalent CFL

and it rolls along a track

Socket Type E26

Dimensions: 20

Framed in a distressed

Dunkirk Chandelier topseller A 3-way rotary socket witchDensely populated with the highest quality beveled crystal beads available, Dunkirk explodes on the scene. Candelabra bulbs from deep within illuminate the crystal laden branches from behind for an effect that is both dazzling and mesmerizing. With a firework feel, Dunkirk is sure to become the centerpiece of any space, destined to cause oohs and ahhs. Available as a flush mount in two sizes and a chandelier in three, these fixtures can be used alone