2D Lightning ideas
This is the final sketch made in Procreate.  I used like 14 frames

This is the final sketch made in Procreate. I used like 14 frames

This is the final result in Unity 3D

This is another idea.

Another Lightning idea

These are some Lightning 2D ideas I've been working on :)

I used Procreate for the scketch, not for any particular reason. I just think it's more comfortable than sitting in front of a desktop computer.
The next step I do in this Workflow is to open the animation in Adobe Animate. Here I correct certain details and add more Frames if necessary. Another step would be to open the animation in Adobe Photoshop to give it some color and some highlights.
Finally I bring all this to Unity 3D and I am working with the timing of the particles. I am also seeing which Material is better in each case for the VFX, be it Alpha Blended or Additive.