Product Description These solar-powered post cap lights are designed for outdoor use on fences, decks, and pathways. They automatically charge during the day and illuminate at dusk. Features: Solar powered no wiring required Compatible with 3.5 x 3.5 inch and 4 x 4 inch posts (mounting adapter included) IP44 waterproof rating for outdoor use Warm light output Easy installation simply mount on post - SPETLEK Solar LED Post Cap Light Square Garden Fence Lamp for 3.5-4 Inch Post in White