This might have already been invented, but how about bright little LED lights that we could pop into the holes on aftermarket bumpers that were designed for the parking sensors for those of us that do not have that option. https://www.superbrightleds.com/moreinfo/marker-clearance/round-led-truck-and-trailer-light-with-grommet-34-clearance-marker-light-bullet-connector-1-led/5707/
