unidentified plant, some kind of succulent

I bought this plant a while ago and I'm having trouble identifying it. I thought it was a hen and chicks when I got it, but it seems to be growing out of control. It doesn't need much water at all and is growing well in pretty dry soil.

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    Has this plant been kept somewhere shady, or has it been growing in full sun? – Bamboo Sep 23 '15 at 17:12
  • Definitely MORE light!! – stormy Sep 24 '15 at 23:27