Abstract: In accordance with the present invention, a sealed beam, high intensity light is housed in a metal case provided with a bracket to one side and the bracket is bolted to an elongated base member that is semicircular in cross-section. A synthetic resin is molded on the inside of the base member to the precise shape and taper of the barrel of a gun, and the assembly is coated with a layer of vinyl resin to provide a nonconductive, corrosion proof surfacing. The length of base member is of a dimension to fit between the two upstanding terminals of a typical 12 volt lantern battery. The light can be mounted underneath the barrel of a gun by clamps positioned at each end of base member and encircling the barrel, or the light can be mounted on top of a lantern battery by two z-shaped clips held by the terminal nuts. The base member also provides a convenient grip to adapt the light for use as a hand spotlight.