If you're curious as to what exactly rock lights are, the name is pretty self explanatory. These are lights designed to help you see rocks on the path when you're off-roading after dark. As opposed to head lights and roof-mounted lighting arrays, however, rock lights are meant to illuminate the obstacles that are directly under and around your vehicle, thus making it easier for drivers to identify hazards and prevent damage to the tires, wheels, or undercarriage.

Rock lights can be referred to by many names, including puddle lights, underglow lights, and courtesy lights. These lights are fastened directly to the undercarriage of a 4x4 vehicle via bolts, a surface mount, or magnetic mounts, and they typically need to be hard-wired to your vehicle's electrical system.

If you're interested in adding a rock light array to your vehicle, the hardwiring element means you might need to seek out an automotive professional or off-road outfitting specialist to do the install. If you choose to do it yourself, beware that a rock light kit can set you back anywhere between $35.99 and roughly $230 on Amazon, while a kit from a pro outfitter like KC HiLites will similarly set you back $235.