Sylvania Dulux FT55DL841RSECO 55W Compact Fluorescent Lamp – 4100K Cool White | 4800 Lumens | CRI 82 | 2G11 4-Pin | 12,000 Hours | Item 20592

The Sylvania Dulux L FT55DL841RSECO (Item 20592) is a 55-watt 4100K cool white long twin tube compact fluorescent lamp delivering 4,800 initial lumens with CRI 82, 2G11 4-pin base, and 12,000-hour rated life. Compatible with magnetic, electronic, and dimming ballasts, this lamp 

Quick Specs

• Brand: Sylvania
• Series: Dulux L
• Item Number: 20592
• Lamp Code: FT55DL841RSECO
• UPC: 046135205927
• Lamp Type: Long Twin Tube Compact Fluorescent (T5 × 2)
• Wattage: 55W
• Color Temperature: 4100K (Cool White — 841)
• CRI: 82
• Initial Lumens (at 25°C): 4,800 lm
• Mean Lumens (at 25°C): 4,128 lm
• Rated Average Life: 12,000 hours
• Base: 2G11 (4-Pin)
• Bulb Type: Twin Tube (T5 × 2)
• Overall Length (MOL): 21.1 inches (535mm)
• Diameter: 0.709 inches (18mm)
• Ballast Compatibility: Magnetic, electronic, or dimming ballast
• Packaging: 10 per case / sold individually

Product Overview

The Sylvania Dulux L FT55DL841RSECO (Item 20592) is a 55-watt long twin tube compact fluorescent lamp from the Sylvania Dulux L series — the standard high-output CFL format for commercial and industrial fixture applications requiring 4-pin 2G11 base lamps. Producing 4,800 initial lumens at 4100K cool white with CRI 82 and a 12,000-hour rated life, this lamp is the primary replacement lamp for 55W 2G11 base fixtures across commercial office, retail, industrial, and institutional lighting applications.

The 2G11 4-pin base requires an external ballast — this lamp is not self-ballasted. Compatible with magnetic, electronic, and dimming ballasts. Life ratings are based on 3-hour burning cycles with ANSI-compliant ballasts. Longer operating cycles increase lamp life. Initial lumens (4,800 lm) are measured after 100 hours of operation. Mean lumens (4,128 lm) are measured at 40% of rated lamp life.

Why Choose This Product

• 4,800 initial lumens — high-output CFL at 55W: One of the highest lumen outputs in the 2G11 long twin tube CFL format — appropriate for high-bay, high-ceiling, and demanding commercial applications.
• 4100K cool white — standard commercial CCT: The most widely specified color temperature for general commercial lighting in offices, warehouses, schools, and institutional facilities.
• CRI 82 — good color rendering: Above the standard 70-series floor, appropriate for commercial retail, office, and institutional environments.
• 12,000-hour rated life: Long service life reduces replacement frequency and maintenance cost across large commercial lamp installations.
• Magnetic, electronic, and dimming ballast compatibility: Works across virtually all 55W 2G11 ballast types — simplifies procurement and reduces SKU complexity.
• 5-manufacturer cross-reference: Direct replacement for GE, Philips, Osram, and Ushio equivalents.

Technical Specifications

Cross-Reference — Direct Replacement For

Always verify wattage, color temperature, base type, and ballast compatibility before substituting.

Replacement Ballasts for 55W 2G11 Lamps

Applications

• Commercial offices and open-plan workspaces – 4100K cool white is the standard CCT for commercial office general lighting; CRI 82 supports reading, screen viewing, and task performance.
• Retail and commercial interiors – High lumen output and CRI 82 support merchandise visibility in retail display and service counter lighting.
• Industrial and warehouse facilities – 4,800 initial lumens at 55W in compact 2G11 CFL fixtures suitable for lower-ceiling industrial and storage area lighting.
• Schools, healthcare, and institutional buildings – Long rated life reduces maintenance frequency in high-volume lamp-replacement environments.
• High-output CFL fixture retrofits – Cross-referenced to GE, Philips, Osram, and Ushio equivalents — appropriate for facilities switching lamp suppliers without fixture modification.

Ballast Compatibility and Installation Notes

• 4-pin 2G11 base — requires external ballast: This lamp is not self-ballasted. Verify your fixture’s ballast type (magnetic, electronic, or dimming) before ordering.
• Life rating basis: 12,000-hour rated life is based on 3-hour burning cycles with ANSI-compliant ballasts. Longer operating cycles will extend lamp life.
• Initial lumens: 4,800 lm measured after approximately 100 hours of operation. Mean lumens (4,128 lm) measured at 40% of rated average lamp life.
• Minimum starting temperature: Depends on ballast type — consult the ballast manufacturer’s specification sheet.
• NEMA end-of-life notice: T5 compact fluorescent lamps on high-frequency ballasts may experience an abnormal end-of-life phenomenon resulting in bulb wall cracking near the base or base area overheating. NEMA recommends high-frequency CFL ballasts include an end-of-life shutdown circuit. See NEMA.org for additional information.

Ordering Information

• Brand: Sylvania
• Item Number: 20592
• Lamp Code: FT55DL841RSECO
• UPC: 046135205927
• Color Temperature: 4100K Cool White
• Base: 2G11 4-Pin
• Packaging: Sold individually (10 per case)
• Case quantities and bulk pricing: Contact ADL Supply for volume orders.

Compliance

• Verify RoHS / TCLP / California Title 20 compliance with manufacturer specification sheet.
• This lamp contains mercury — dispose per local lamp recycling regulations. Visit lamprecycle.org.

ADL Supply recommends confirming all compliance data with the Sylvania official product data sheet prior to installation.