Razz, no interference of running LED headlight bulbs and halogen fog/driving lights. However in my opinion I think it looks kinda goofy because the headlights are nice and bright and white while the fog/driving lights are dim and have that yellow halogen dullness to them. Do both, you will be much happier with the look and you will also notice a difference with fog/driving lights done as well when driving at night.
Birddog
