Rock Lights (in the wheel wells?) look neat. Remember when undercarriage lights (blue, purple, red...!) were popular with lowo-riders?
I have Rigid diffused fog lights on my Rigid after-market bumper, and amber ditch lights for fog from Heretic. They'll compliment my Heretic roofrack array (Trailrax), plus my 30-inch Rigids on the bumper and 4-inch beams on the bumper. With all that, I think I have the all the lumens I need.
Incidentally, I had heavy fog in Massachusetts Berkshire hills one night, recently. I shut off my headlights and went only on the Rigid (dispersed, white) fogs. They worked nicely, and I didn't get high-beam-annoyance flicks from oncoming traffic.