I am going by photos only, but this new one confirms what I saw a while back, especially if you look at the left-most bag. I don't quite get the "electric" aspect, but EB seems to be darker than FB, and vibrant but not eye-poppingly bright. I really like it and would like it even if it turns out to be brighter. I say that because a lot of times photos can tone down the brightness of FB, too.
I recently bought a pair of shoes from the fall Balenciaga collection, and the box describes them as "fluor Elektra." They are darker than FB when compared side by side, and very bright. I wonder where they fall in the spectrum? They are sort of what I originally expected would be EB.