I've looked into it, and you cannot have more than 4 lights on at a time (2 pairs). You can have as many lights as you want, but you can only have 4 lights on at a time. That includes your headlights. So a pair of fog lights and headlights are acceptable or headlights and driving lights. And the extra lights you have on with your headlights cannot be at the same level or above your headlights. If you have lights mounted on a roll bar, you cannot use them on the road or if you have driving lights mounted on the bumper that is in line with the headlights you cannot use those either.