What lighting concept took you the longest to truly understand?

I’m curious how different creators experience this.

I’ve worked in video and production for years, and lighting still feels like the one skill everyone struggles with at some point.

For me it was understanding why a setup worked, not just copying tutorials.

Some days lighting clicks instantly.

Other days nothing looks right even with good gear.

So I’m wondering across photographers, filmmakers, students, hobbyists, and educators:

What lighting concept took you the longest to figure out?

Was it:

• shaping light? • soft vs hard light? • motivation? • color temperature? • controlling spill? • recreating a look consistently? 

I’m currently building a tool focused on helping people learn lighting visually, so hearing real experiences is incredibly valuable.

Genuinely interested in what people struggled with most.