[FED 387]

6 inches is the correct answer ----all others are all supposed to be at 6 inches--however some 60 foot lights may be set between 6 and 13 inches for cars that wheel stand long distances- I was thinking about static height of the vehicle of 3 inches--actually the starting line lights height I believe is closer to just over 2 inches--regardless looking at the picture the red car tripped the finish line light with something other than the wheel-- how he did it is for future discussion