As a general rule you should set up 2 lighting sources: diffused light in the entire room, and a mirror light.  

Contrary to what you would expect, the mirror light is the most important one.

Unfortunately, however, I see many people entrusting it completely to the bathroom decor, which provides a built-in solution without worrying too much about the quality of the lighting fixture.

For this reason there are many mirrors that spread a bluish light, more suitable for a morgue than a designer home.

At the mirror, the direct light source must be filtered through an opal diffuser, to avoid the creation of shadows on the face during the make-up or shaving process.

And last but not least, the general light in the bathroom can be direct or indirect.

It all depends on the specific situation, the important thing is that there is enough light when needed.

If possible, a step light should be added to facilitate the access at night.