OSRAM Dulux L 321400 (55W/954) T5 Compact Fluorescent Lamp — 55W | 5400K Daylight | 4,000 Lumens | 4-Pin 2G11 Base

The Osram Dulux® L Lumilux® De Luxe 321400 (55W/954) Lamp is a commercial-grade, high-CRI single-ended compact fluorescent bulb engineered for color-critical inspection bays, professional photography studios, print matchmaking shops, dental labs, and low-profile architectural troffers. Delivering 4,000 initial lumens of crisp 5400K natural daylight illumination, this premium 55-watt tube utilizes an advanced 90+ CRI tri-phosphor chemical coating to guarantee Class 1A color fidelity. Outfitted with an industry-standard 4-pin 2G11 plug-in base and a compressed dual-tube layout, it provides a 12,000-hour rated average service life when powered by high-frequency electronic ballasts featuring automated end-of-life (EOL) protection.

ADL Supply Expert Application & Replacement Guide

The Osram Dulux® L 55W/954 compact twin-tube lamp is a premier facility standard specified heavily across commercial print shops, artwork galleries, clinical examination chambers, textile dye matching rooms, and digital content studios. Operating at an exact 5400K cool daylight balance, this module avoids the yellow-amber distortion of soft lamps and the unnatural oversaturated blue spikes of low-grade daylight tubes. By concentrating high-intensity tri-phosphor generation across an ultra-flat dual-bar configuration, it enables property teams to deploy shallow recessed ceiling troffers or low-profile wall-washers without sacrificing visual distance or target footcandle levels.

Critical Ballast circuit Synchronization and 4-Pin 2G11 Mounting Controls: Plant engineers executing large-scale building lighting upgrades must verify underlying control system variables prior to cart completion. This 4-pin module is designed entirely without an internal starter capacitor, requiring an external high-frequency electronic ballast or battery-backed dimming network to operate. To protect equipment housing frames from localized thermal stress, this lamp must be coupled exclusively with electronic ballasts featuring end-of-life (EOL) safety auto-disconnect protection circuits.

Ensure proper physical identification: while this module shares a matching 4-pin 2G11 base with standard 40W and 50W long compact tubes, it tracks a distinct 22.40" overall length and electrical load current. Forcing this 55W lamp onto uncalibrated ballasts or low-wattage tracks will cause immediate terminal ignition dropout, severe cathode blackening, or premature control gear blowout due to electrical mismatch stresses.

Detailed Product Specifications

• Brand Name: Osram (OSRAM Sylvania Product Portfolio / Ledvance Group)
• Product Series Line: Dulux® L Lumilux® De Luxe High Color Fidelity CFL Series
• Osram Factory Logistics Stock Code SKU: 321400
• Manufacturer Description Model Nomenclature: DULUX L 55W/954 (Class 1A Variant)
• Core Technology Class: Compact Fluorescent (CFL) — Low-Pressure Gas-Discharge T5 Twin Tube
• Primary Control Requirement: High-Frequency Electronic Ballast (Equipped with EOL Auto-Shutdown Circuitry)
• Operational Power: 55.0 Watts
• Nominal Arc Voltage Profile: Ballast Managed (Nominal continuous voltage across internal mercury columns)
• Continuous Operating Amperage Draw: 0.550 Amperes baseline current profile
• Initial Luminous Brightness: 4,000 Lumens (Post standard 100-hour seasoning burn at 25°C)
• Luminous Efficacy Ratio: 72.7 Lumens per Watt (LPW)
• Color Temperature Configuration: 5400K Cool Daylight Spectrum (954 Specialized Phosphor Matrix)
• Color Rendering Index (CRI): 90+ Ra (Class 1A Elite Color Accuracy Profile)
• Base Type Configuration: 2G11 (Single-Ended 4-Pin inline plug-in block)
• Starter Capsule Integration: None — Requires high-frequency electronic ignition circuit
• Glass Tube Nominal Diameter: T5 Profile (16mm / 0.63" Inches actual outer twin glass widths)
• Maximum Overall Length (MOL): 535mm / 22.40" Inches structural length face to tip
• Light Center Length (LCL): 535mm
• Rated Average Service Lifespan: 12,000 Hours (Based on standard electronic pre-heat rapid start parameters)
• Chassis Burn Position Limit: Universal — Operates reliably at any vertical or horizontal mounting angle

Operation, Safety & Mounting Compliance

High-Frequency Electronic Signal Transformation

When driven by modern high-efficiency electronic programmed-start control lines, this 4-pin compact bulb operates at frequencies exceeding 40 kHz, completely eliminating stroboscopic workspace eye fatigue and structural flickering. This high-frequency baseline enables the lamp to support deep dimming tracks, daylight harvesting interfaces, and automated room occupancy sensor loops without triggering false shutdowns or reducing overall cathode lifetime curves.

Low-Mercury Vapor Dosing and Safe Bulk Recycling Protocols

This compact lamp incorporates a finely metered mercury vapor fill dose inside its gas chamber to activate its high-efficacy visibility track. While optimized to ensure clean lifecycle performance and pass standard TCLP guidelines, the presence of mercury vapor dictates that spent lamps must be securely processed through certified regional commercial bulk recycling repositories during facility maintenance sweeps rather than discarded into standard municipal solid waste streams.

Commercial Equipment Industry Cross-References

This premium 4-pin 55W 2G11 compact bulb serves as a direct drop-in replacement or electrical equivalent for the following lines:

• Philips Lighting Alternative: Master PL-L 55W/950/4P / USA Order Code 138446
• Sylvania Reference Match: FT55DL/950 / Professional Series Long Compact Line
• GE Lighting Alternative: F55BX/950 / Cinema High-CRI Studio Biax Series

Bulk Commercial Lighting Supply & Project Support

ADL Supply handles volume distribution shipments, multi-pack logistics, and contractor project quotes for procurement teams, schools, and warehouse facilities nationwide.

For specialized contractor pricing tiers, job-site pallet deliveries, or comprehensive submittal documentation, contact our support team directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.