In addition to upgraded H4 headlights, I have a pair of
Warn W350F fog lights that provide a nice broad spread to light the sides of the trail. I have some
PIAA 510 long-range lights but they're focused too narrow for trail use - they're simply to supplement the high beams on high-speed backcountry highways.
For actual nighttime rockcrawling usage (which happens more often than not, because by the time I get off work on a Friday night and get up to the mountains to find my campsite it's pitch black out) I needed better flood lighting. I hate the look of a vehicle covered in a ridiculous number of lights though, so I picked up four of the smallest, brightest flood lights I could find:
Rigid SRM2 with the diffused lens. I have one pair mounted on windshield light brackets at the base of my windshield, and I'm fabbing up a tailgate-mounted bracket to put the other pair in back. With each light angled outward, I'll have a full 360° spread of light available, including down at the ground just beneath the doors so I can keep an eye on tire placement in the dark. With each light switched individually, they'll also provide terrific campsite illumination without disturbing other campers. And being LED, I can run them all night if necessary, and never worry about killing my battery.