Sylvania Dulux 18W 3500K 4-Pin FT18DL/835/ECO 20588

Sylvania 20588 FT18DL/835/ECO – 18W Dulux® L ECOLOGIC® Twin-Tube CFL | 1,250 lm | 3500K | 82 CRI | 2G11 4-Pin | 12,000 Hours | TCLP Compliant

The Sylvania 20588 (FT18DL835ECO) is an 18W Dulux® L ECOLOGIC® twin-tube compact fluorescent lamp with a 2G11 4-pin base, delivering 1,250 lumens at 3500K (Natural White) with 82 CRI and 67 lm/W efficacy. This is the non-RS (standard) version — compatible with magnetic, electronic, and dimming ballasts via rapid-start/preheat starting. ECOLOGIC® reduced-mercury technology (3.0 mg) meets federal TCLP criteria for non-hazardous waste classification. The FT18DL and FT18DL/RS are not electrically interchangeable — confirm the correct version before ordering. Please verify base type and ballast compatibility before ordering.

Technical Specifications

Product Overview

The Sylvania 20588 (FT18DL835ECO) is the standard (non-RS) version of the 18W Dulux® L ECOLOGIC® twin-tube CFL at 3500K (Natural White). At 1,250 lumens from 18W with 82 CRI and 67 lm/W efficacy, it provides balanced, neutral-white light well-suited to offices, retail spaces, and institutional environments where neither warm nor cool illumination is preferred.

This is the standard version — not the RS (Rapid Start) version (NAED 20594, FT18DL/835/RS/ECO). Despite sharing the same 2G11 4-pin base and physical appearance, the FT18DL and FT18DL/RS are explicitly identified by Sylvania as not electrically interchangeable. The standard version has a different overall length (224.79mm / 8.85″) than the RS version (267mm / 10.51″) — confirming the physical difference between these two products.

The ECOLOGIC® designation indicates 3.0 mg mercury content meeting federal TCLP criteria for non-hazardous waste classification. Lumen maintenance is 80% at 8,000 hours and 76% at rated end of life (12,000 hours).

Compatible Applications

• Indirect fixtures and cove lighting
• Wall sconces and wall washing
• Recessed and surface-mounted fixtures with 2G11 sockets
• Landscape lighting
• Signage and display backlighting
• Task lighting

Before Ordering – Verify

• Standard vs. RS: This is the standard (non-RS) version, NAED 20588. The RS version is NAED 20594 (FT18DL/835/RS/ECO) and is a physically different lamp (267mm vs 224.79mm length). The FT18DL and FT18DL/RS are not electrically interchangeable. Confirm which version the ballast and fixture require.
• Base: 2G11 (4-pin). Confirm the fixture socket is specifically 2G11.
• Ballast: Compatible with magnetic, electronic, and dimming ballasts rated for 18W 2G11 Dulux L lamps (standard, non-RS).
• CCT: This lamp is 3500K (835, Natural White). The 18W Dulux L ECO family is also available in 3000K (830, NAED 20587).
• Overall length: 224.79mm (8.85″). Confirm the fixture accommodates this length.

Safety and Handling Guidelines

• This lamp contains mercury (3.0 mg, ECOLOGIC®). If broken, ventilate the area and follow EPA fluorescent lamp breakage cleanup guidelines; do not vacuum broken pieces
• Recycle through a designated lamp recycling program per applicable local, state, and federal regulations
• Disconnect power before installing or replacing the lamp
• Handle by the base; avoid contact with the glass tubes

Compliance

• ECOLOGIC® — meets federal TCLP criteria for non-hazardous waste classification (3.0 mg Hg)
• Contains mercury — dispose of per local, state, and federal regulations
• 2G11 4-pin base for magnetic, electronic, or dimming ballasts (standard, non-RS)

Ordering Information

• NAED: 20588
• Ordering Abbreviation: FT18DL835ECO
• UPC: 0046135205880
• Case Quantity: 10 per case
• RS sibling: 20594 (FT18DL/835/RS/ECO) — not interchangeable
• 830 (3000K) sibling: 20587 (FT18DL830ECO)

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.