WYZM 15" Adjustable and Flexible Aquarium Light Bulb Holder Gooseneck Clamp for NANO Tanks(12" adjustable Holder) NO BULB,ONLY 15" Heavy Duty Adjustable Light Bulb Holder The lamp holder is adjustable,12" long,with a button ON/OFF button Packing:1pcs 15" goose neck clip ONLY,no bulb.