Hi Folks,
unfortunately , i´m having the same issue only with some FLYTAMPA sceneries. In my case it´s LOWW,KBOS and KLAS. When I posted the issue at the FlyTampa-Forum, "Martin" told me the same as to the original poster (LUA-Script issue), also that some other costumers had reported the same behaviour in P3D5.
In my case, i´m on P3Dv4.5HF3 installed from scratch. AIG was the last to install and in fact , that was when i started to see this issue.
I did the test : deactivating AIG, all was good, reactivating (reinstalling) AIG, runway lights were on again. Very strange indeed and never seen before.
Might there be any offending files worth to check ? Anyway, i´m "glad" that i´m not hte only one .
Best regards
Lars Stahmann