Add some light and style to your posts with this pack of 4" x 4" Solar LED Post Cap Light by GreenLighting. With a focus on using the natural power of the sun, GreenLighting provides you with high quality solar lighting at an affordable price. This versatile post cap can be used on 4 x 4 nominal wood posts or 4x4 PVC and Vinyl posts on patios, decks, and fences. The included AA Ni-CD battery is recharged every time the solar panel absorbs direct sun light. A convenient on/off switch automatically turns the LED lights off and on based on the surrounding light. No additional wires or power source are needed. It is recommended to install these post cap lights in an area that receives sunlight for 6 to 8 hours a day. Bundle includes 12 post cap lights; Each measures 6" x 6" x 4.1"; Base measures 3.63" x 3.63". Fits 4 x 4 nominal wood posts, and 4 x 4 PVC or Vinyl posts with included adapter.