Powerful solar charging performance and super bright LED's offer 6 possible color choices which can be changed with the flip of a switch. Lenticular light diffusing lens and domed reflector maximize light output. Installs easily with no wires. Patent pending universal fittings for 1-5/8", 1-7/8", 2-3/8", Brock Post, and 3-1/4" ID posts, as well as flat surfaces.