The rugged cast aluminum Imperial solar post cap is designed using three high-output LEDs to provide a brilliant white light, with contemporary design. And the powder-coated finish means no future painting. Solar light cap stays lit for up to 10 hours. Lights up automatically every night. Auto-off switch; adapter included. Manufactured from durable cast aluminum. Will fit over an actual 4 x4-inch PVC or nominal 4 x4-inch wood post. Dimensions: 6L x 6W x 2.5H inches. All are stocked locally and available to ship immediately. LED light, integrated solar panel, includes NiMH battery. Brilliant bright-white light output. 1-year warranty.