Changing how we light our homes and offices could save energy, but new lighting technology requires new materials with the right properties. Materials called hybrid perovskites could be vital in making change possible. Scientists discovered that changing the length of small spacer ions located between the perovskite’s internal layers manipulates the structure, distorting the layers to look like corrugated cardboard. The shortest spacer studied led to the most distorted structure. The structure emitted white light, comparable to commercial fluorescent lights.