(4 Pack) Blue Commercial Solar Road Stud Deck Dock Light with Recessed Anchor Automatically illuminates when night falls or with the onset of inclement weather Provides up to 18 hours of light and has a visual distance of 800 yards 6 LED Lights Maximum Compression: up to 30 tons Dimensions (not including anchor) 5.19" x 4.8" x .9" (L x W x H); Anchor Dimensions 1.22" x 2.08" (W x H)