12 Pack Green Lighting Solar Powered Post Cap LED Light for 5" x 5" PVC Posts (Off White) Base features a 5" diameter for plastic/PVC/vinyl posts The 8 lumen LED light is automatically activated by night fall 100% solar powered w/ no external wiring necessary Rechargeable battery included (1.2V AA 300mAh Ni-CD) Designed to fit on ONLY 5" x 5" Vinyl, PVC or Plastic posts