What's with black superheroes and lightning powers?

Title pretty much sums it up. Watched a video recently where someone was asked to name a black superhero that didn't have lightning based powers and while I could name a few it made me realize just how prevalent the trope is.

But why?

Edit: Y'all I'm not asking for examples of black heroes that don't have lightning powers. I'm asking why it's a trope to begin with 😮‍💨