Abstract: A hazard/safety warning device is disclosed which has a lamp member and a base, the lamp member being able to be used with and without the base. The base has a self-righting feature so that when the lamp is in the base, the lamp will rock to the vertical position. The lamp is activated by rotating a fresnel lens about its longitudinal axis relative to the body. A bonnet connection allows the lamp member to be attached to the base. The base is external ribs for stability of operation, and the body of the lamp has at least two handles. The filament of the globe is located at the optical centre of lens, with the lens being designed to have a generally vertical directed beam along the longitudinal axis, and an annular, transverse beam generally horizontal. The remainder of the lens provides a diffused light.