Sylvania Dulux T/E IN ECOLOGIC 20893 (CF18DT/E/IN/835/ECO) Lamp — 18W | 3500K Natural White | 900 Lumens | GX24q-2 4-Pin Base

The Sylvania Dulux® T/E IN ECOLOGIC® 20893 (CF18DT/E/IN/835/ECO) Lamp is a commercial-grade, high-efficiency triple-tube amalgam compact fluorescent lamp (CFL) engineered for high-density architectural recessed downlights, commercial task fixtures, corridor wall sconces, and insulated office ceiling troffers. Delivering 1,164 initial lumens of balanced 3500K natural white illumination, this premium 18-watt plug-in module utilizes an advanced rare-earth tri-phosphor coating to achieve an excellent color rendering index of 82 CRI. Outfitted with an industry-standard GX24q-2 4-pin electronic base and structured with a low mercury fill weight, it provides a dependable 12,000-hour rated average service life when driven by certified programmed-start electronic ballasts.

ADL Supply Expert Application & Replacement Guide

The Sylvania Dulux® T/E IN 20893 compact fluorescent lamp is an established commercial facility maintenance baseline specified universally across institutional complexes, public commercial buildings, high-traffic medical plazas, and luxury hospitality corridors. Delivering a balanced 3500K natural white visual field profile, this intermediate spectrum bridges the gap between warm hospitality tones (3000K) and clinical cool whites (4100K). This balanced coloration renders focus-optimized visual fields that improve task clarity and occupant comfort while maintaining tight lumen maintenance across continuous commercial operations.

The defining engineering element of this module is its integrated "IN" amalgam formulation. Unlike standard compact fluorescent tubes that experience heavy lumen degradation when trapped inside airtight luminaire trims, this advanced capsule utilizes an integrated mercury-amalgam chemistry matrix. This configuration actively stabilizes internal vapor pressures across a broad thermal loop, maintaining full light projection inside deep downlight cans where interior casing parameters reach **ambient operating temperatures of 35°C (95°F) up to 65°C (149°F)** in the base-up position.

Critical Programmed-Start Electronic Ballast Requirements and Keyed Base Boundaries: Licensed electricians and property maintenance crews executing routine layout upgrades must monitor hardware boundaries closely prior to checkout: this 4-pin capsule is not self-ballasted and requires an un-dimmed external programmed-start electronic ballast rated for 18W GX24q-2 circuits to function safely. Standard 2-pin magnetic ballasts (GX24d-2) are completely incompatible and will fail to mount.

Programmed-start ballasts preheat the internal cathode structures prior to arc ignition—ensure the fixture employs shunted lampholders where socket contact contacts connect correctly. Furthermore, the GX24q-2 base incorporates a specific keyed mechanical alignment tab. Never attempt to force this 18W bulb into alternate 13W or 26W sockets, as cross-wattage mismatching will cause severe non-ignition flickering, inducing rapid filament degradation that destroys the tube end seals.

Detailed Product Specifications

• Brand Name: Sylvania (OSRAM Sylvania Product Portfolio / ECOLOGIC® Commercial Series)
• Product Series Line: Dulux® T/E IN Amalgam Triple-Tube Compact Fluorescent Family
• Sylvania Factory Product Order Code SKU: 20893 (Corrected unified inventory model identifier)
• Manufacturer Description Model Nomenclature: CF18DT/E/IN/835/ECO
• Abbreviation Code: CF18DTEIN835ECO
• NEMA Generic Code Tracking Matrix: CFM18W/GX24Q/835
• International Manufacturing Code Sync: IEC 60901-3418 Standard Compliant
• Core Technology Class: Low-Pressure Gaseous Discharge — Amalgam Compact Fluorescent (T4 Triple-Tube 3U Layout)
• Ignition Starting Method Classification: Programmed Rapid Start Only (Electronic Ballast Controlled)
• Primary Control Requirement: External 18W Programmed-Start Ballast Outfitted with EOL Shutdown Protection
• Operational Lamp Power Draw: 18 Watts
• Nominal Running Arc Voltage Drop: Ballast Managed Sustaining Operating Voltage
• Initial Luminous Brightness: 1,164 Lumens (Post standard 100-hour laboratory seasoning burn)
• Mean Luminous Lifecycle Output: 900 Lumens (Calibrated at 40% of rated average lamp service life)
• Systemic Luminous Efficacy: 64.6 Lumens per Watt (LPW)
• Color Temperature Configuration: 3500K Natural White (835 Tri-Phosphor rare-earth chemical blend)
• Color Rendering Index (CRI): 82 Ra (High Commercial Visibility Task Accuracy Profile)
• Base Type Configuration: GX24q-2 (Single-Ended 4-Pin keyed plug-in base with center alignment pin)
• Maximum Overall Length (MOL): 4.60" Inches (117.0mm total structural height face-to-tip)
• Nominal Bulb Profile Diameter: T4 Shape Body Profile (12.0mm actual triple-tube cylinder width)
• Rated Average Service Lifespan: 12,000 Hours (Based on standard 3-hour industrial cycling shifts)
• Chassis Burn Position Limit: Universal — Optimized for Base-Up vertical tracking profiles
• Environmental Assessment Rating: Ecologic® Brand Standard — EPA TCLP Compliant for reduced toxic waste leaching

Confirmed Compatible Ballast Cross-Reference Tracking

This premium 18W GX24q-2 compact fluorescent lamp operates safely when paired with the following commercial ballast models:

• GE Lighting: 71434 GEC218-MVPS-3W UltraMax Series
• Philips Advance: ICF-2S18-H1-LD SmartMate Multi-Volt Block
• Sylvania Quicktronic: 51823 QTP1/2X18CF/UNV DM Professional Series
• Universal Triad: C218UNVME-000K Compact AccuStart Line
• Halco Lighting: EP2CF18PS/MV/DC/K High Performance Element
• Keystone Technologies: KTEB-218-UV-TP-PIC-DW Smartwire Ballast
• Robertson Worldwide: PSM218CQMV Low-Profile Circuit Ballast
• Fulham Electronic: RH2-UNV-218-K RaceHorse Series Pack
• Hatch Transformers: FR1800 Linear Specialty Ballast
• Howard Lighting: EP2/18CF/MV/K Commercial Core Ballast

Operation, Safety & Mounting Compliance

High-Frequency Low-Flicker Electronic Current Damping

When retrofitted onto approved high-efficiency electronic ballasts, this lamp processes power over precise high-frequency square waves, completely eliminating the visual strobe flicker and loud 60Hz hum characteristic of vintage magnetic ballasts. This solid-state control matrix maintains uniform mercury vapor distribution path lines within the clear glass casing, ensuring stable lumen delivery without causing localized overheating near the terminal base pins throughout extended commercial operations.

Commercial Equipment Industry Cross-References

This premium 18W GX24q-2 compact triple-tube lamp serves as a direct drop-in replacement or alternative for the following lines:

• GE Lighting Alternative: F18TBX/835/A/ECO Biax T/E Amalgam Series / Catalog Code 97623
• Philips Lighting Match: PL-T 18W/835/4P/ALTO MasterColor Single-Ended Line / USA Product Code 149005
• Osram Reference Line: Dulux T/E 18W/835 Plus High Efficacy 4-Pin Technical Replacement
• Satco Hygrade Reference: CFT18W/4P/835 Commercial Grade Triple-Tube Code S8342
• Ushio Reference Match: Ultra T/E CF18TE/835 Compact Fluorescent Architectural Series

Bulk Commercial Lighting Supply & Project Support

ADL Supply delivers commercial-volume logistical fulfillment, tiered commercial contractor discounting strategies, and full pallet project quoting options to electrical accounts across the United States.

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.