Reusable Revolution Solar Powered Post Cap Light w/ Pointed Top for 6x6 PVC Posts (White) VERSATILE - Base features 2 different sizings; 5.75" diameter and a 6" diameter for all you posting needs AUTO ON/OFF - Take the work out of having to maintain your lights! A built-in sensor detects surrounding light and will automatically turn your lights off and on eliminating the need to constantly maintain them. EASY INSTALL - The 100% solar powered design requires no additional wiring or parts so you can take your light out of the box and get it up and running the same day! IT'S ALL THERE - From a weather resistant base to the included 1.2V AA 300mAh Ni-CD rechargeable battery GreenLighting has you covered! PRODUCT SPECIFICATIONS - Each light measures 6.25" x 6.25" x 4.25"