Landing lights not showing
Yesterday I loaded the default 172 for a night flight, and when I switched on the landing light I found I didn't have them - the 3D effect was there, but there was no illumination of the taxiway/runway.
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=21&t=67820
Have you enabled "pilot controls lights" in the settings?