Thank you for visiting Lit Systems, Inc. Click on the topic of your interest and the information will appear below the list. about lit systems LIT Systems, Inc. is a general contracting firm based in Chattanooga Tennessee serving the entire Southeastern United States. We focus on maintenance of and inspection of wireless facilities and their ancillary systems. We sell and offer contract (and per occurence) maintenance of obstruction lighting systems. We provide turnkey wireless provider site installation from grading to line sweeping.