Darth Vader is costume I see executed with varying degrees of screen accuracy on a regular basis. I’ve come across a few different steampunk Vaders, a princess Vader, and other versions of the character. But this is the first time I’ve seen a cosplayer show the moment when Emperor Palpatine unleashed Force lightning upon Vader. The lighting effect can be achieved with LEDs, and you could rig a little fog machine to simulate smoke.
See what the Force lightning and smoke look like in this video by Noel Alexander Costill.