High Performance solar lights stays lit for up to 10 hours Casts a brilliant white light downward onto the outside walls of the post cap and surrounding area Lights up automatically every night High output surface mount LED technology 3x brighter than standard LEDs 1 Long life AA Ni-MH rechargeable battery included Manufactured from durable White Vinyl (PVC) wont fade or yellow Will fit over an actual 5x5 post Quick and easy Do It Yourself installation. 15 Lumens / 4500-5500 Kelvin