4-Pack Solar White Post Deck Fence Cap Lights for 4" X 4" Post With Amber LEDs and Vertical-lined Clear Lens LEDs color: 5 Bright Amber LEDs Mounting Base (Inside Diameter): 3 3/4 "X 3 3/4" (Solid Wooden/Composite Post) OR 4 1/16" X 4 1/16" (Hollow PVC/Vinyl/Plastic Post). (PLEASE GIVE US YOUR SIZE) Material: Premium Heat-Resistant Plastic Automatic on at dusk, off at dawn (on/off manual override switch) Operating Time: Up to 8 hours (depending on weather, temperature, regions and sunlight intensity available)