【答案解析】Several companies are venturing into this new market. India's Cosmos Ignite Innovations has developed the MightyLight, a solar-powered LED-based lamp that is waterproof, portable and runs for up to 12 hours. It has sold nearly 5,000 of its $50 lamps to various charities. America's Better Energy Systems is testing add-ons that might work well with its Solio, a portable solar array that can also be used to charge mobile phones and other devices. The International Finance Corporation (IFC), recently secured $5.4m in financing for "Lighting the Bottom of the Pyramid", a four-year initiative that will engage lighting manufacturers with pilot projects in Kenya and Ghana.