Cool!There's a photo on Wikipedia's Tesla page that might have something to do with this:
Nikola Tesla - Wikipedia, the free encyclopedia
It looks like it's three lights, not 200, and assuming that those cables in the background have something to do with the experiment, then the power was probably transmitted (inducted?) over a couple hundred feet at most.
That would probably be doable with the technology Tesla had access to. Horribly inefficient, but doable.
I assume the pic is connected to Tesla's paper The Transmission of Electrical Energy Without Wires which is about, well, the transmission of electrical energy without wires.
It's written in his usual hyperbolic style where everything he does is the "first decisive experimental evidence of a truth of overwhelming importance for the advancement of humanity."