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Compact fluorescent lights (CFLs) are very popular for saving energy, usually about 75% savings over incandescent bulbs.
CFLs for the home have a built-
CFLs may not be as bright as their incandescent equivalent wattage bulb. Check the lumens rating on the package and compare to the lumens chart on the Light Bulb Packaging Info page.
Before you replace every bulb in your house with CFLs, there are a few limitations. Future technology will improve or eliminate these limitations.