I like the general idea of Castle Dooku but the background is a bit too cyan for my taste (a crumbling dank grey with a hint of blueish green would carry the idea a bit better).
It would be great if the lights flickered on and off like flame torches or candles and were a bit more amber than deep red.
If you added another one on the top you would get a trianglular formation which could translate subsonsciously as resembling a flame while still being a piece of technology.