SYLVANIA 20584 | FT40DL/830/RS/ECO Dulux® L 40W 4-Pin CFL Twin Tube Lamp

The Sylvania 20584 (FT40DL/830/RS/ECO) is an industrial-grade, energy-efficient **40W compact fluorescent twin-tube lamp** from the premier Dulux® L Ecologic® product line. Featuring a high-efficiency single-ended **T5 glass profile** paired with a heavy-duty **2G11 4-Pin plug-in base**, this space-saving lamp is engineered to produce light outputs identical to standard 2-foot linear fluorescent tubes while using half the structural length. Delivering an impressive **3150 initial lumens** of smooth, inviting **3000K Soft White** light, this versatile lamp features an integrated rapid-start ignition cathode and is fully optimized for use across commercial electronic, magnetic, or high-frequency dimming ballast circuits.

High Lumen Delivery and Universal Ballast Adaptation

Sylvania Dulux® L Ecologic® lamps are engineered with advanced tri-phosphor coatings to maintain outstanding color integrity and brightness across their functional lifespan. Producing a rich **82 CRI** profile, this twin-tube setup prevents target spaces from looking flat or washed out. Its universal electronic component architecture permits hassle-free pairings alongside electronic rapid-start, instant-start, magnetic, or specialized low-voltage dimming ballasts, allowing you to easily adjust energy layouts in large commercial grids.

• Ecologic® Environmental Compliance: Safely passes all rigorous federal TCLP testing standards, minimizing heavy metal presence and promoting cleaner green-energy disposal.
• Advanced Lumen Retention: Sustains a high **2710 mean lumens** field across continuous operations, maintaining workspace illumination levels.
• Modular 2x2 Optimization: Allows high-output, compact 2x2 recessed troffers to deliver identical optical lumen fields to standard, sprawling 2x4 linear layouts.
• Incandescent Retrofit Reference: Employs an efficient 4:1 conversion ratio, matching the lumens of legacy 150W incandescent bulbs while drawing a mere 40W of line power.

Technical Specifications

• Brand: Sylvania
• Product Code / NAED: 20584
• Ordering Abbreviation: FT40DL/830/RS/ECO
• Family Brand Name: Dulux® L
• Wattage: 40W
• Base Type: 2G11 (4-Pin Plug-In)
• Bulb Shape: T5 Single-Ended Twin Tube
• Initial Lumens (at 25°C): 3150 lm
• Mean Lumens (at 25°C): 2710 lm
• Color Temperature: 3000K (Soft White / Warm White)
• Color Rendering Index (CRI): 82
• Maximum Overall Length (MOL): 22.4 Inches (573 mm)
• Tube Diameter: 0.630 Inches (16 mm)
• Average Rated Life: 20,000 Hours (Based on extended burning cycles)
• Industry Standards: ANSI C78.901 - 2001 & TCLP Compliant

Cross Reference & Compatibility

• Industry Brand Substitutions: GE F40/30BX/SPX30, Philips PL-L 40W/830/4P, Osram Dulux L 40W/830, Ushio CF-L40SE/830, generic code FT40W/3000K/2G11.
• Replacement 40W 2G11 Ballasts: Advance ICN-2TTP40-SC, Sylvania QHE2X40DL-UNV-ISN-SC, Sylvania 51833 QTP2x26CF/UNV DM, Universal Triad C240PUNVHP-B.

NEMA End-of-Life System Safeguards

Industry-wide standards supported by NEMA indicate that T2, T4, and T5 sub-compact fluorescent sources driven by high-frequency ballasts can experience intense thermal loads during their natural end-of-life burnout phase. This may result in localized glass fracturing or socket deformations at the base connector. To prevent this, NEMA strictly recommends operating these lamps alongside electronic high-frequency ballasts containing integrated **end-of-life (EOL) auto-shutdown circuits** (such as Sylvania Quicktronic® installations equipped with Quicksense® architecture) to cleanly disconnect system lines in the rare event of an abnormal filament exhaustion. Minimum starting temperatures remain fully dependent on ballast choice; verify system requirements with your ballast manufacturer.