Depends if you are using 12v DC and the vehicles power, or you are talking 120V AC lighting. There are a ton of options where you can come up with your own stuff based on what you are actually trying to accomplish.
A lot of guys in my neck of the woods run a generator and have a food truck or even trailer parked on the side of the road with tables, which seem to be full most of the time BTW. They light up their cook area and other areas too. You can do an easy internet search to find a myriad types of lights and then fabricate mounting options and configurations to suit your needs.