I would have to argue against your first point It implies that the universe is finite and that one could theoretically reach any point instantaneously by travelling at the speed of light I was thinking that since you are travelling at the speed of light and as are your headlights the distance that they seem to travel in front of your vehicle would remain constant Also at that incredibly high speed you would most likely be overdriving your headlights So because of that I think that if one were travelling at light speed headlights wouldnt be much use