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Compact Fluorescent Lights (CFLs)

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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-in ballast at the base to convert line voltage (120 V) to voltage that will light a bulb. Because of this ballast these bulbs tend to be bigger than incandescent bulbs and may not fit well in certain light fixtures or lamps. CFLs may protrude from a ceiling recessed fixture more than an incandescent bulb. These fixtures usually can be adjusted so the CFL sits higher in the fixture.

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.

CFL Bulbs Table CFL Wattage Comparison Table

CFL Limitations

Before you replace every bulb in your house with CFLs, there are a few limitations. Future technology will improve or eliminate these limitations.