I realize that this Nicoli Tesla was a genius inventor and everything but a movie about a man, a fuse box, and the electric plug is not going to interest anyone but physics majors.
Folks there is a reason none of us have ever heard of Nicoli Tesla: he is a boring man who did boring things. I don't want to see his schematics. I don't want to see a close up of a light bulb.
Now if this were a movie about Bowie playing a demented magician, that would be a great role.