SYLVANIA 21670| FBO32/835/6/ECO OCTRON® Curvalume® 32W 3500K T8 U-Bend Fluorescent Lamp

The Sylvania 24040 FBO32/835/6/ECO OCTRON® Curvalume® is a commercial-grade **32W U-bend linear fluorescent lamp** engineered for high-density 2x2 recessed ceiling troffers, square modular luminaires, and architectural office fixtures. Outfitted with standard **G13 Medium Bi-Pin bases** spaced on a **6-inch leg separation**, this space-saving T8 bulb emits a balanced, professional **3500K Neutral White** color profile. Utilizing a premium rare-earth tri-phosphor coating to deliver an accurate **82 CRI** baseline, it produces **2,850 initial lumens** over an extended **15,000 to 28,000-hour rated lifespan** depending on the specific ballast configuration and switching cycle frequency. Built under Sylvania’s strict **Ecologic®** guidelines, this dimmable, low-mercury bulb passes Federal TCLP safety standards to supply energy-conscious and sustainable illumination to busy corporate environments, schools, and medical spaces.

OCTRON® Curvalume® Geometry and Sustainable Ecologic® Efficiencies

Sylvania OCTRON® Curvalume® U-bend lamps squeeze the full power and luminous performance of a standard 4-foot straight T8 linear tube into a compact, space-optimized 2-foot footprint. This smart configuration makes it the standard choice for architectural 2x2 ceiling grids, eliminating the dark spots or uneven coverage patterns typical of traditional linear retrofits. Engineered to Sylvania's strict **Ecologic® standards**, these tubes minimize chemical waste parameters while maintaining high lumen retention curves. This design delivers a bright **2,680 mean lumens** at the 40% lifecycle midpoint, ensuring consistent, glare-free light delivery across massive commercial networks.

• Flexible Ballast Integration: Seamlessly matches industrial 265mA magnetic rapid start ballasts, or high-frequency electronic instant-start, rapid-start, and programmed rapid-start T8 ballasts.
• Dynamic System Lifespan: Delivers a commercial **15,000 to 28,000-hour rated average life**, expanding significantly when paired with high-performance ballasts or longer switching runtime schedules.
• Balanced 3500K Spectrum: Provides a professional neutral white presentation with a clean 82 CRI rating, ideal for offices and retail areas requiring high visual clarity without looking clinical.
• Bulk Case Value Packing: Managed and distributed in tight wholesale cases containing **16 lamps per master crate** to ensure intact institutional supply lines (1/SKU).

Comprehensive Technical Specifications

• Brand: Sylvania
• Product Code / NAED: 24040
• Ordering Abbreviation: FBO32-835-U6 (FBO32/835/6/ECO)
• Series / Product Family: OCTRON® Curvalume® (Ecologic® Brand)
• Technology Type: Linear Fluorescent - U-Bend Profile
• Nominal Wattage: 32W
• Bulb Shape Profile: T8 Curved (1-Inch / 25.4mm Tube Diameter)
• U-Bend Center-to-Center Spacing: 6-Inch Leg Separation
• Base Type: G13 Medium Bi-Pin Connection
• Initial Lumens: 2,850 lm (Measured at 25°C ambient after 100 runtime hours)
• Mean Lumens: 2,680 lm (Measured at 40% of average rated lamp life)
• Color Temperature: 3500K (Neutral White / Color Code 835)
• Color Rendering Index (CRI): 82
• Average Rated Lifespan: 15,000 to 28,000 Hours (Governed by ballast switching parameters)
• Maximum Overall Length (MOL): 22.6 Inches (574 mm)
• Standard Case Quantity: Shipped in standard packs of 16 lamps per case

System Integration, Wiring Schematics & Ambient Guidelines

• Instant Start Mode Controls: When operating this lamp on high-frequency instant start electronic ballasts (with ballast factors between 0.71 and 1.20), the two contacts or lead wires of each individual lampholder socket must be physically shorted and bound together. Route the linked lines into the single appropriate ballast wire following National Electrical Code (NEC) wiring methods.
• SUPERSAVER® Ballast Requirements: For energy-saving variants operated on F32T8 ballasts, ensure the ballast supplies a minimum open-circuit voltage threshold of **550V RMS** at the lamp terminals. Avoid using these configurations inside air-handling fixtures, low-power-factor ballasts, remote setups below 550V, or standard emergency lighting inverters unless explicitly listed for compatibility.
• Thermal Instability & Striation: If the operating bulb is exposed to sudden drafts or ambient room temperatures fall below **60°F (16°C)**, a rhythmic pulsing pattern of light running down the tube (**striation**) or a noticeable reduction in brightness may occur. This behavior is a temporary physical characteristic of fluorescent gas chemistry and will not damage the lamp. Removing the drafts or raising the ambient temperature will instantly restore normal light production.
• Duty-Cycle Parameters: Catalog lifespans are derived from a standard 3-hour switching loop per ANSI guidelines. Increasing the operational runtime duration per start cycle will substantially lengthen the average lifespan of the phosphors.

Recommended Commercial & Corporate Applications

• Commercial Office Troffers: The standard light source for 2x2 parabolic and louvered ceiling fixtures inside commercial office complexes and corporate conference rooms.
• Institutional Grid Ceilings: Ideal for public university classrooms, school libraries, and government municipal spaces requiring durable, low-maintenance lighting systems.
• Retail and Healthcare Corridors: Perfect for hospital pathways, medical exam rooms, and retail banks where bright, high-contrast visual acuity is necessary.