CFL

This type of light bulb uses a fraction of the electricity used by incandescent light bulbs. CFLs are becoming a household name for many reasons, including the attention given to them by Congress. Due to the their inefficient use of energy, incandescent bulbs will be banned by Congress, starting in 2012, with a complete phase out by 2014; even existing halogen bulbs will not make Congress’ new mandate to make all bulbs 70 percent more efficient by 2020.