Triple Tube

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Triple tube 2-pin CFLs pack three parallel tubes into a compact form factor, delivering higher lumen output than double tube versions in a similarly sized package. These lamps are designed for magnetic ballast fixtures that need more light from a single socket.

Brand Naming Conventions

The triple tube format follows the same brand naming pattern as other plug-in CFLs:

  • Philips (Signify): PL-T — the "T" designates triple tube
  • GE: Biax T
  • Sylvania (Ledvance): Dulux T

The triple tube design is commonly used in commercial downlights and recessed fixtures where maximum brightness is required from a compact plug-in CFL. Cross-compatible across brands when base type, wattage, and color temperature match.

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