That slim light was designed for motorcycle and atv use, they mount them between handlebars, that's why it's so small.
The good part, it work on anything with 12V and I think it would make a great backup light, being so slim. Maybe even a smaller unit inside the bed (under bed cover)
Also, it would work better behind the grill vs. current double stack ones, because of the grill design. With old design you lost about 10-15% of light output, with this one it would be more like 5%.