httpv://www.youtube.com/watch?v=B22hJL7eBHM
After this video demonstration of dynamic lights added to the 747-400 Queen of the Skies II in Prepar3D v4, then try them by yourself with the free update released by PMDG.
Uninstall first your 747-400 installed in P3D v4 according to PMDG message.