January 02, 2018 04:41 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)? Don't CFL bulbs cost a lot more than incandescent bulbs?