I thought they were fogs? If we'd got an S15, it would have probably had those. UK cars must legally have at least one rear fog light. That means they wack a hideous red bolt-on to the bottom of the bumper. The sensible option is move the wiring and turn one of the reversing lights into a fog
The sensible option is unfortunately not what is always chosen. I am plannign on making some fibreglass panels to cover the holes when I remove them. I don't really want to get the whole bumper resprayed for them.