Get professional grade light in your work area, yard, or building quickly with the GT-421CP-S String Light This 1500 Lumens LED String Light spans 10 ft. with a single high intensity discharge head. This unit can be added onto an existing GT-421CP String Light, to get you the perfect length without buying an entire set. Link up to 40 total light heads together from a single plug. Each light head includes easy attachment and hanging mechanisms as well as includes a pivot-action socket for perfect light placement. Save time and money with energy efficient LED technology rated for 50,000-hours of use.