Circle PLC-18W CFL Bulb 4 Pin G24q-2 4100K Cool White Double Tube 4 Pack

Circle PLC-18W CFL Bulb 4 Pin G24q-2 4100K Cool White Double Tube 4 Pack

• DIRECT REPLACEMENT CONFIDENCE (Compatibility & Cross-Reference) FITS YOUR FIXTURE — This 18-watt double tube compact fluorescent CFL bulb features a standard G24q-2 4-pin base, providing a direct drop-in replacement for fixtures using Sylvania 20668 (CF18DD/E/841/ECO), Philips PL-C 18W/841/4P/ALTO, and GE F18DBX/841/ECO4P. If your fixture currently holds any of these bulbs, this Circle replacement installs without any rewiring or fixture modification.
• BALLAST COMPATIBILITY (The #1 Customer Question) BALLAST-OPERATED DESIGN — This 4-pin G24q-2 CFL is designed to operate with compatible electronic and magnetic ballasts rated for 18-watt PL-C double tube lamps. The 4-pin configuration requires a ballast — it is not a direct line-voltage plug-in. Verify your fixture uses a G24q-2 socket (not G24d-2, which is 2-pin) before purchasing. For replacement questions, the base type can be confirmed by counting the pins on your existing bulb.
• LIGHT QUALITY & APPLICATIONS 4100K COOL WHITE LIGHT WITH 82 CRI — Delivers crisp, neutral cool white illumination at 4100 Kelvin with an 82 Color Rendering Index (CRI), producing accurate, natural-looking light that reduces eye strain in task-oriented environments. Ideal for offices, conference rooms, commercial retail spaces, hallways, kitchens, utility rooms, storage areas, and recessed downlight fixtures. The 841 designation confirms 4100K color temperature with 80+ CRI — a commercial-standard specification.
• LIFESPAN & VALUE 12,000-HOUR AVERAGE RATED LIFE — Each bulb is rated for up to 12,000 hours of average operation, meaning fewer replacements, lower maintenance frequency, and reduced per-fixture cost over time. This 4-pack provides dependable, long-lasting performance for both residential and commercial applications where reliable uptime matters. At 18 watts per bulb, this compact fluorescent consumes less power than equivalent-output incandescent or older fluorescent sources.
• SPECIFICATIONS & PACK DETAILS COMPLETE SPECIFICATIONS: 18 Watts | G24q-2 4-Pin Base | 4100K Cool White | 82 CRI | Double Tube (PL-C) | 6 Inches Overall Length | Replaces: Sylvania 20668 / CF18DD/E/841/ECO, Philips 38329-9 / PL-C 18W/841/4P/ALTO, GE F18DBX/841/ECO4P | Pack of 4 | Model: PLC/18/E/DD/841 | For indoor use in ballast-operated fixtures only. Manufactured by Circle to match original OEM specifications.