(4 Pack) Solar White LED Round Polycarbonate Road Stud Deck Dock Path Light Automatically illuminates when night falls or with the onset of inclement weather Provides up to 20 hours of light and has a visual distance of 650 yards 6 LED's per light, Rechargeable Ni-MH (700mAh) battery included Maximum load/compression capacity up to 20 tons Dimension: 4.3" in Diameter and 1" high