I have soft top 2000 Wrangler with snow plow. Since I'm unaware of any light bracket that will support the weight and dimensions of a rotating warning beacon, I had to improvise by purchasing a garden hoe, inverting it, bolting handle to rear gate, and mounting the light on the platform formed by the hoe end. It works, but it still looks like an upside down garden hoe with a light attached.
Is there a product manufactured that will serve as a light bracket for a beacon (or strobe) warning light??