Enlighted, a startup using sensor and big data software to control lighting and power in large commercial buildings has hit a few milestones this week. The company, which we put on our 12 smart grid startups to watch in 2012, has raised a sizable $20 million round, and has also doubled the size of the building space under management over the last five months, to hit 10 million square feet of commercial real estate.

Enlighted says its customers include Google (s GOOG), LinkedIn, Bank of New York, Turner Broadcasting and the City of San Jose. New investors RockPort Capital and DFJ JAIC joined the round, along with existing investors Kleiner Perkins, Draper Fisher Jurvetson, and Intel Capital.

The startup’s lighting control tech can individually measure and manage lighting at each light fixture and can cut energy consumption from lighting in office and commercial buildings by 50 to 75…