somebody here has done a XR LED backlight with the skyline tail ligts in the brakes, i got it and made a led tail light for the XFG too... but for personal use, because i started from somebody else's work... you can get something like that and adapt to the other cars tail lights... i haven't done it yet because i have no way to see if it's good cause i'm a demo racer and the CMX Viewer doesn't show this mods... sorry for my bad english...
i like to do Light Mod's too and i just appreciate other people's work, sorry if you misunderstood me, but i neve said that i was gonna use it, and i think it's sad your behavior about demo racers ( talking about everyone, not you in an isolated case )... i don't use a crack and don't intend to use it, because i think that's disrespect to the hard work of the devs.
and BTW, next month i'm gonna buy the license... just because of the BF1...
But if your track is done already ( like his track ) you could do like the olympics race track. make sort of a straight connecting the starting point to the track.
being black like this, the lights really "light up" ? because i did something like this once, and the lights lack intensity... and i could barely see the front car's taillights and didn't knew when the guy hit the brakes...