Let's first off explain our title. What do we mean by 1.21 Gigawatt? I'm going to quote the character Doc Brown from the movie Back to the Future (http://www.imdb.com/name/nm0000502/?ref_=tt_trv_qu):
Why are we talking about the movie Back to the Future? This is where the name Flux comes from. It's time for another quote from the same movie: