By far the easiest and more widely used way of lighting paths is by applying mushroom or tiered bulbs. These lights are easy to install, usually solar powered, and make the light right where you want which it. Mushroom lights get their name using their shape, they resemble a mushroom having a cap into it. The light is placed below cap and the cap makes sure that the light gets reflected back down at ground level where participating in something it. Not necessarily that, the cap gives adequate space to place a solar array electrical so most of these lights are solar powered and all you need to try to install them is stake them into the ground and tend to forget about all of. They work great on driveways or any path around your residence.
Finally, to wait. This will take several years depending at your cash availability, but pays off off typically the long run in looking after your parking lot. Remember, incremental improvements will be superior and cheaper than doing naught. Stick with the plan