I like the old Lucas 576 style, with the bullet centre: There's a pair shown on the first page of this thread, with yellow lenses. I prefer the clear lenses, though. On the right build I'd have one fog light and one spotlight on the front, and a single fog light on the rear with a clever multi-element LED in it so that it will shine red as a rear fog light and white as a reversing (or anti-tailgating) light.