It makes sense to have more than one headlight. If you have a single headlight, you create hard shadows behind obstacles. With two or more lights placed in different locations on the rover, the amount of shadow reduces. It also adds redundancy.
These days, people here on Earth who drive in unlit terrain have switched to light bars, which take this idea a step further:
All Moon rovers so far have not been operated in the dark. Even in daytime, astronauts using the LRV reported difficulty reading the terrain (estimating distances and scales); this would be harder in the dark. Robotic rovers don't have to rely on visible light cameras alone. Estimating distances becomes much easier if you have radar or lidar sensors, for instance.