Replace Fog lights with Led running lights - 2007

[lurky]

Hi,
For cosmetic reasons, I'd like to replace the factory lights on the left with led running lights on the right.
I have found several led light kits so my only question is, do the factory lights serve any real purpose? I did a quick check and they don't seem to contribute in any way to the turn signal lights, headlights or brights. I think these are the fog lights, but I would have no idea how to turn them on, so they're not doing me any good anyway. IS there any downside to this? Thanks