Plot summary
Melody brings Daphne, Bay, and Travis with her to Mexico to help distribute hearing aids to deaf locals. Emmett unexpectedly shows up and when Bay learns that he has started seeing Skye, it sends her into a jealous fury. Daphne is touched by the work she's doing and sets out to go the extra mile to assist the community with the help of a fellow volunteer. Meanwhile, Melody's boyfriend Gabe proposes that they adopt a deaf child together. Title reference: From the painting Instead of Damning the Darkness, It's Better to Light a Little Lantern by Hassan Massoudy.
Credits
Adapted from Wikipedia contributors, Switched at Birth season 4. HTML formatting and reference markers removed.