With SunPower being the efficiency leader, it has seen an even larger boost than many of its peers, and as Fool solar expert Travis Hoium points out, having the efficiency edge gives it better future prospects than rival First Solar and other players in the space. Finally, Ultra Petroleum has dropped more than 7% to hit a new multiyear low after announcing earnings. The company met earnings expectations but posted a much bigger drop in revenue than expected: Sales fell 20% from the year-ago quarter. But what likely spooked investors was that Ultra slashed its capital investment in half and sees pressure to its production. As a low-cost leader in the industry, Ultra is best poised to survive low gas prices, but even Ultra has its limits. Can solar shine brighter? Find out more about the solar industry by reading our premium report on First Solar. Inside, you'll learn why First Solar is finding tough competition from SunPower with details that every solar investor needs to know about now.