Lighted plastic discrepancy buoy

A buoy comprising a substantially flat disc-like flotation body portion which is relatively thin axially and wide laterally and symmetrical about a central axis, said flotation body having a central axial bore formed entirely therethrough, a depending elongated ballast tube having an upper end portion fixedly anchored within said bore and terminating substantially at the top surface of said flotation body portion and extending for a substantial distance below said body portion to stabilize the buoy in a normal upright position, a battery housing centrally disposed on the top face of said flotation body portion immediately above and covering the top of said ballast tube, and a centrally disposed elevated light support for the buoy mounted on and extending substantially above the flotation body portion, said light support comprising paired generally vertical legs rising from said flotation body portion and having lower ends anchored to the top of said body portion, said legs symmetrically arranged about the central axis of the buoy, and a box-like reinforcing and interconnecting cap for the tops of said legs including corner substantially tubular sockets receiving upper end portions of the legs and secured thereto, whereby said cap rigidly braces all of the legs, said cap having a top wall forming a mounting seat for a light means.