SYLVANIA FT40DL835RSECO | Dulux® L 40W 3500K Twin-Tube 4-Pin 2G11 Lamp

The Sylvania Dulux® L 40W Compact Fluorescent Lamp (FT40DL835RSECO) is an industrial-grade, high-performance **40W linear twin-tube T5 lamp** designed for high-lumen, low-profile commercial lighting systems. Outfitted with a standard **2G11 4-Pin plug-in base** and measuring **22.4 inches** in length, this premium fluorescent bulb outputs a powerful **2,900 initial lumens** in a clean **3500K Natural White** color appearance. Engineered with advanced tri-phosphor coatings that achieve an **80 CRI** color accuracy baseline, it delivers a **15,000-hour rated lifespan** under standard operating cycles. This high-efficiency lamp is a premier choice for shallow recessed modular troffers, architectural downlights, and decorative wall sconces.

High-Lumen Architectural Performance and Multi-Ballast Versatility

Sylvania Dulux® L compact fluorescent lamps capture the impressive light concentration of full-length linear fixtures and condense it inside a space-saving, single-ended layout. Fully compliant with standard **ANSI C78.901-2001** technical frameworks, this 40-watt bulb provides clean rapid-start operation loops and functions smoothly across electronic high-frequency, magnetic conventional, or architectural dimming ballast configurations. Boasting an exceptional **2,494 mean lumens** maintenance threshold, this long-life bulb prevents noticeable dimming over its service life, keeping facilities brightly illuminated while lowering general operational overhead.

• ECOLOGIC® Eco-Conscious Build: Manufactured to meet strict environmental standards, minimizing heavy metal footprints while passing federal TCLP safety guidelines.
• High Spatial Lumen Density: Generates an impressive 2,900 lumens of balanced, crisp light output, focusing superb visual clarity across extensive commercial floor plans.
• Flexible Ballast Integration: Configured for clean electrical matching across standard high-frequency electronic, magnetic, or dimming architectures built for 2G11 40W loads.
• Simplified Commercial Upkeep: Delivers a reliable **15,000-hour rated service life** to drop building maintenance cycles, reducing routine lamp replacement costs.

Technical Specifications

• Brand: Sylvania
• Ordering Abbreviation: FT40DL835RSECO
• Series / Product Family: Dulux® L (Ecologic® Series)
• Technology Type: Compact Fluorescent Lamp (CFL) - Linear Twin-Tube
• Wattage: 40W
• Bulb Configuration: T5 Tube Layout (0.63-Inch Diameter)
• Base Type: 2G11 (Single-Ended 4-Pin Plug-In)
• Initial Lumens: 2,900 lm (Measured after 100 runtime hours)
• Mean Lumens: 2,494 lm
• Color Temperature: 3500K (Natural White Light Spectrum)
• Color Rendering Index (CRI): 80
• Average Rated Lifespan: 15,000 Hours (Based on standard 3-hour cycling thresholds)
• Maximum Overall Length (MOL): 22.4 Inches (573 mm)
• Standard Package Quantity: Shipped in standard factory wholesale packs of 10 lamps per case
• Industry Standards Compliance: ANSI C78.901 - 2001 Spec Standard

Industry Compatibility Cross-Reference

This 40W 4-pin Dulux L lamp directly matches and retrofits with the following manufacturer product identifiers:

• GE / Current: F40/30BX/SPX35 (F4030BXSPX35)
• Philips / Signify: PL-L 40W/835/4P (PLL 40W/35/4P)
• Osram: Dulux L 40W/835
• Ushio: CF-L40SE/835
• Generic Alternate: FT40W/3500K/2G11

Certified Replacement Ballast Pairings

To secure correct electrical metrics and safeguard system efficacy, pair this 40W bulb with certified ballast systems:

• Sylvania Quicktronic: QHE2X40DL-UNV-ISN-SC or 51833 QTP2x26CF/UNV DM
• Advance / Philips: ICN-2TTP40-SC (Centium Series)
• Universal Triad / Vossloh-Schwabe: C240PUNVHP-B

Ballast Operation & NEMA Protective Safety Guidelines

• NEMA EOL Recommendations: There is a documented industry technical issue noted by NEMA where high-frequency electronic ballasts driving T2, T4, and T5 lamps can run into an abnormal end-of-life condition. This can trigger base overheating, base melting, or focal glass stress. NEMA strongly advises operating this 40W lamp on high-frequency ballasts built with an active **End-of-Life (EOL) shutdown circuit** to safely isolate power loops during failure modes.
• Thermal Startup Baseline: The minimal operating starting temperature threshold is dictated entirely by the underlying ballast internals. Always consult specific ballast data sheets before installing in cold spaces.
• Burning Cycle Efficiencies: Stated lifespans are verified using standard 3-hour switching routines. Running the system on extended, continuous burning cycles yields a corresponding, substantial increase in total overall hours of lamp life.

Recommended Commercial Applications

• Shallow Recessed Modular Troffers: Perfect for standard 2x2 ceiling grids in office spaces where vertical clearance is limited.
• Institutional Corridor Lighting: Provides dependable, high-output natural white ambient illumination inside hospitals, school hallways, and university public sectors.
• Architectural Wall Sconces: Highly suited for hotel lobbies, conference center walkways, and executive boardrooms requiring clean, indirect low-clearance lighting profiles.