Did Luke Know Palpatine Could Produce Force Lightning before Episode VI?

The Non-Canon Expert looks at whether Luke knew that the Emperor could produce Force lightning before their confrontation in the Emperor’s throne room in Episode 6, explaining how this knowledge affected Luke’s decision following his defeat of Darth Vader. This is a Legends story for Luke Skywalker and the events seen in Return of the Jedi with information found within the Episode 6: Return of the Jedi novelization.