[netnick]

Do you know how to code ambient light in F16?

It depends on iStep but the parameters are almost the same 
On the latest ones use RGB
On the older ones just choose preinstalled

I've tried to change values, but still no luck. May you can help me? Here's my 2018 BDC ncd. (2018 F16 with the latest I-level. 

THX

This NCD is differ from G30 one, thus it's not supported by this ambient light change tool.

BUT, you can use another one my tool: https://cartechnology.co.uk/showthread.php?tid=51247
Just modify following parameters:
AMBIENTE_FARBE_ENSEMBLE_X_LAYER_Y
Where X is an ambient light scheme number in menu and Y is the layer (from top to bottom).