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Quad-Tube CFL Lamps

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Quad-tube CFL lamps pack four parallel fluorescent tubes into a single, compact lamp body, producing some of the highest lumen outputs available in the compact fluorescent format. Common wattages range from 18W to 57W, making these lamps well suited for commercial recessed downlights, torchieres, floor lamps, and wall-mounted fixtures in offices, hotels, healthcare facilities, and retail spaces.

These lamps use 2G10, 2G11, GX24q, or similar 4-pin bases and require a compatible CFL ballast. Always confirm pin count and base type match your existing ballast before placing a bulk order. Quad-tube lamps are available in a range of color temperatures from 2700K to 5000K, with high-CRI options for applications where accurate color rendering matters.

For smaller-envelope fixtures or lower wattage requirements, compare with our Triple-Tube CFL Lamps. Contractors planning a longer-term efficiency upgrade can explore our full LED Light Bulbs selection for direct lamp replacements that eliminate ballast dependency. Browse the complete Compact Fluorescent Lamps section for all CFL types stocked by RelightDepot.