High Performance solar lights stays lit for up to 12 hours Casts a brilliant white light downward onto the outside walls of the solar post cap and surrounding area Lights up automatically every night High output surface mount LED technology, 3x brighter than standard LEDs 2 long life Ni-MH AA rechargeable batteries included Durable Tan Vinyl (PVC) Will fit over an actual 4x4 post Quick and easy Do It Yourself installation. 15 Lumens / 4500 5500 Kelvin Patent No: 6,581,335 B2 No: D460,570 S