"This pack of 4 LED solar fence post lights takes all the hassle out of installing lights on your fence or in your decking area. Each LED solar post light outputs 3 lumens of bright light, which is a significantly brighter light than regular solar powered lights. These post cap lights easily mount on top of standard 4"" x 4"" posts. You can install them on wooden piles or fences in the garden, decking, gate fence or any outdoor location you like. - EONLION Outdoor Solar LED Square Deck Post Light Garden Fence Landscape Lamp in Black"