Sylvania 21781 FO32/841/ECO T8 Octron ECO 4100K 32W

The Sylvania 21781 FO32/841/ECO is a commercial-grade Octron® 800 Ecologic® 32W T8 linear fluorescent lamp engineered for general illumination in offices, healthcare facilities, educational institutions, and retail environments. Delivering approximately 2,850 initial lumens of 4100K cool white light at 85 CRI with TCLP-compliant Ecologic® low-mercury construction, this lamp provides a 30,000-hour rated service life on compatible electronic ballasts — reducing replacement frequency and disposal costs across large commercial relamping programs.

ADL Supply Expert Application & Replacement Guide

The Sylvania FO32/841/ECO (Item 21781) is a commercial facility standard specified for corporate office troffers, healthcare corridor fixtures, institutional classroom grids, and retail ceiling systems where 4100K cool white is the specified color temperature and TCLP-compliant low-mercury construction is required for environmental compliance programs or simplified bulk disposal. This lamp is compatible with both instant-start and programmed-start electronic ballasts — but the lampholder type must match the ballast: instant-start ballasts require un-shunted (non-shunted) bi-pin lampholders; programmed-start ballasts require shunted bi-pin lampholders. Confirm your fixture's existing lampholder type before ordering when retrofitting, particularly when changing ballast start methods during an upgrade. For partial relamping across a multi-fixture installation, confirm all existing lamps are 4100K before ordering — mixing 4100K and 3500K or 3000K lamps in the same visual field creates a perceptible and unprofessional color inconsistency.

Detailed Product Specifications

• Brand: Sylvania (Ledvance)
• Product Line Series: Octron® 800 Ecologic® T8 Linear Fluorescent
• Manufacturer Part Number: FO32/841/ECO
• Sylvania Item Number: 21781
• UPC Barcode: 046135217814
• ANSI Standard: ANSI C78.81-2001
• Core Technology: T8 Linear Fluorescent — Octron® 800 Tri-Phosphor
• Ballast Requirement: Electronic ballast rated for 32W T8 — instant-start or programmed-start
• Wattage: 32W
• Initial Lumens: Approximately 2,850 lm — confirm with Sylvania specification sheet
• Color Temperature (CCT): 4100K Cool White
• Color Rendering Index (CRI): 85 Ra
• Base Type Configuration: G13 Medium Bi-Pin
• Tube Diameter: T8 — 1.0 inch (25.4mm)
• Maximum Overall Length (MOL): 47.78 inches (1213.6mm)
• Nominal Length: 48 inches / 4-foot class
• Start Type: Instant Start or Programmed Start compatible
• Dimmable: Yes — with compatible dimming ballast
• Burn Position: Universal — Any Orientation
• Rated Average Lifespan: 30,000 Hours
• Environmental Rating: Ecologic® — TCLP Compliant, Reduced Mercury
• RoHS Compliant: Verify with Sylvania specification sheet

Operation, Safety & Mounting Compliance

Lampholder Type, Ballast Compatibility & Color Temperature Consistency

As with all 4-foot T8 linear fluorescent lamps, the lampholder type must match the ballast starting method. Instant-start electronic ballasts apply high open-circuit ignition voltage directly across the lamp pins — requiring un-shunted lampholders where both pin contacts within each socket are electrically isolated. Programmed-start ballasts preheat the cathodes before arc ignition — requiring shunted lampholders where both contacts are internally connected. Installing the wrong lampholder type for the ballast causes non-ignition or premature lamp failure. When performing partial relamping in an existing installation, confirm all replacement lamps match the 4100K color temperature of the remaining lamps — mixing CCT values within the same visual field creates a color inconsistency that is immediately perceptible to building occupants.

Ecologic® Mercury Content, TCLP Compliance & Disposal

This lamp contains mercury and must be recycled through a certified lamp recycling program in compliance with applicable federal, state, and local regulations. The Ecologic® reduced-mercury formulation is TCLP compliant, qualifying spent lamps for non-hazardous waste disposal treatment in applicable jurisdictions and reducing bulk disposal costs for large institutional relamping programs. Regardless of TCLP status, lamp recycling through a certified program remains required in most states. For a certified recycler visit lamprecycle.org. This product cannot be shipped to CA, CO, HI, ME, MN, OR, RI, or VT.

Before You Order

Industry Cross-Reference Data

• GE Lighting: F32T8/XL/SPX41/ECO (equivalent 32W 4100K T8 Ecologic extended life)
• Philips: F32T8/TL841/ALTO (equivalent 32W 4100K T8 ALTO platform)
• Osram: F32T8/841/XL (equivalent 32W cool white extended life T8)
• Legacy Cross-Reference: Direct replacement for standard F32T8/841 4-foot T8 lamp positions in electronic ballast commercial troffer, strip, and institutional fluorescent fixture installations

Bulk Commercial Lighting Supply & Project Support

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For formal wholesale inquiries, volume pricing modifications, or manufacturer spec sheet documentation, reach our commercial branch directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.