LED Ground Markers are easy to use and bright Light Sticks designed to use as outdoor markers! Light up the Night Golf course or set up your own glowing soccer game! LEd Marker Sticks also make great camping light sticks that can be used as tent safety lights or trail markers. You can also use the Glowing Markers to outline your Glow Marathon or Bike Ride routes! Each glow marker comes with 3 AG13 Batteries that are replaceable.