March 30, 2017 18:26 Updated Follow Yes you can. The U.S. Department of Energy estimates that if every home in the U.S. changed just one incandescent bulb for a CFL, it would save enough electricity to light 7 million homes. Related articles What if a CFL bulb breaks? Are they dangerous? I heard they have mercury inside. How much electricity can I save using Compact Fluorescent Lights (CFLs)?