Need help with fixture selection to highlight massive rock wall next to driveway.

There is some room between wall and concrete that I will fill with rocks. I also need lights a long driveway. I can uplight from the the base of the wall or maybe a flood light from across the driveway. I can mount a light on the lower column across the driveway.

 

Looks like a fun project, Laura. You don't say how much of the rocks or the road you want to illuminate but I can make some general recommendations. The way I see it, there's a couple of different approaches. First, you could do some combination of path lights down near the base of the rock wall (to highlight the base of the wall) and distribute spotlights and/or floodlights among the rocks to highlight different areas. An alternative approach is to floodlight the wall more broadly (either from directly below or from fixtures mounted on the opposite side of the road) as in the stacked retaining wall photo. I also think that if you illuminate the rocks and the trees above fairly brightly, there's a good chance you'll find that the light that bounces off of those surfaces serve as sufficient lighting for the road surface itself. I'm happy to offer more suggestions, if you can offer more details about what you want to accomplish. HTH