The best is to check other working cars & trying to understand how it was created.
For lights, best technique is to offset them to -+ 0.0003 - 5 depending on brakes or lights on
some cars lights are a bit dim, for a check try "Chevrolet Camaro Z/28 (1969)" those lights work good from the outside views, not so great on cab view (1) but the bonnet view you can see the lights very well