The next generation lighting and green buildings markets are huge.
Here are 12 hot startups hoping to mine the space.
They come from the Cleantech 100 list of privately held companies. The list, with 55 startups from the United States, 13 from the United Kingdom, 10 from Germany, five are from Israel and three from India, is meant to identify companies with the potential to grow rapidly. No Chinese companies made the cut.
Here are three companies developing high efficiency lighting:
