D.light designs and sells affordable solar lanterns in developing countries. It sells its three product lines - S2, S20, S300 - through local dealers and distributors in 32 countries. The lanterns provide bright, clean lighting as an alternative to kerosene lanterns. D.light faces challenges in building credibility, creating a new product category, and overcoming the legacy of kerosene, but sees opportunities through demonstrating quality, trustworthy distribution partners, and emphasizing solar's advantages over kerosene.