LED, CFL or Halogen Bulbs – Which Light Bulbs Are Best for Your Home? According to EnergyStar.gov, more than 70 percent of sockets in America still contain the old, inefficient incandescent light bulbs. They’ve challenged America to change just 20 million light bulbs to energy efficient light bulbs such as LED light bulbs in 2014. Learn how a small change like switching to energy efficient light bulbs can mean to our environment and your wallet.