Lacking a conventional power grid, Tibetan herders and farmers use the sun’s energy to power their homes. A $500 donation through the Solar Electric Light Fund (SELF) can buy a complete solar home system for one family: a 50-watt solar module, battery, controller, switch, wiring, and bulbs. The fund is also working to to bring electricity to the community, which will ultimately improve its education and health care programs and allow farmers to do their own agricultural processing.