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Duo-Tube CFL Lamps

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Duo-tube CFL lamps are compact fluorescent lamps with two parallel fluorescent tubes connected at one end, producing a compact, high-output light source in a space-efficient configuration. These pin-base lamps are designed for use in commercial downlights, wall sconces, ceiling fixtures, and surface-mount luminaires that require a compact, non-integrated CFL source that can be replaced without replacing the entire fixture. The two-tube configuration produces good lumen output from a small physical footprint, making them suitable for a wide variety of commercial indoor applications.

Duo-tube lamps are available in 2-pin and 4-pin base configurations. Two-pin versions are non-dimmable and work with standard magnetic or electronic CFL ballasts. Four-pin versions are designed for use with electronic ballasts and offer faster starting, longer lamp life, and better lumen maintenance over the lamp service life. Common wattages range from 5W to 26W in standard compact sizes. These lamps are widely used for ongoing maintenance in offices, hotels, and institutional facilities across the country.

For related compact fluorescent lamp options, see our quad-tube CFL lamps for higher-wattage 4-tube versions, and browse spiral CFL lamps for medium-base screw-in applications. Compatible ballasts are in our CFL ballasts section, and the full compact fluorescent range is at compact fluorescent lamps.