Strange setup with the accelerator. There are two tubes, both straight. I'm going to assume that whatever trick Randall pulled would need a lot of energy, and that you only get in the circular ones. The linear (stright) ones are used to accelerate particles into the circular ones, but having two is a little bit unnecessary, since they can't integrate with each other.
I'm even more confused with the conspiracy now that Randall obviously knew about the pendants, so they can't have been insurance for Ben and his friends, in case Randal went rogue. And what is Randall's end game? It can't be keeping the world dark, but he does seem to not want all the pendants in one basket, and therefore be used to light the world again. If he caused the blackout, he could be waiting for something, but I have no idea what.