"You really can't raise up above subsistence living if you don't have light, electricity and energy, " says Lucey.

CNN: 'Solar sisters' spreading light in Africa

During her 20-year career as an energy executive, Lucey says she'd seen how access to electricity was fundamental for economic growth.

CNN: 'Solar sisters' spreading light in Africa

"This gives them a chance to earn money in a way that is a lot more steady -- they have control over it and that money can come into the family, " says Lucey, who is based in Rhode Island, in the United States.

CNN: 'Solar sisters' spreading light in Africa