As FFF has said different a/c and situations require different procedures.
It is better to teach somebody to think about why they are using certain bits of kit and when it is appropriate, for example on a bright summers day is anybody going to see Nav lights? No, so what's the point of having them on. On a very dull day or at night, of course put them on, but don't just blindly follow instrctions without thought as to why. That works fine in an airline environment, but a few steps down the food chain it might not be sensible.
Different horses, different courses