Add some light and style to your posts with this 2 pack of Nominal 4" x 4" Slim Solar LED Post Cap Lights for Wood Posts 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 is designed to be used on your nominal 4 x 4 wood patio, deck, fence, or pathway posts. 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 2 post cap lights; Each light measures 5.75" x 5.75" x 2.76"; Base measures 3.63" x 3.63".