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Sylvania 20890 CF42DT/E/IN/841/ECO 42W CFL 10-Pack — main product image
Sylvania

Sylvania 20890 CF42DT/E/IN/841/ECO 42W CFL 10-Pack

42W

Bulk 10-pack of Sylvania 42W triple-tube CFLs delivering 3200 lumens of cool white light with a 12,000-hour lifespan.

$49.99*
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*Price sourced from Amazon.com. Last updated:Aug 27, 2026.Price and availability are subject to change — details.

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Overview

The Sylvania 20890 CF42DT/E/IN/841/ECO is a 42-watt compact fluorescent lamp built around a triple-tube design with a GX24q-4 4-pin base. Producing 3200 lumens at a 4100K cool white color temperature, it delivers the kind of bright, neutral illumination favored in offices, healthcare facilities, retail spaces, and institutional settings. The 82 CRI ensures that colors appear reasonably accurate under the lamp's light, making it suitable for environments where visual clarity matters.

Sold as a 10-pack, this bundle is well suited for facility managers and maintenance teams who need to keep replacement stock on hand. Each lamp is rated for 12,000 hours of operation and carries Sylvania's ECOLOGIC designation, indicating reduced mercury content compared to standard CFLs. The lamp is engineered for use with electronic and dimming ballasts, providing flexibility in both new installations and existing fixture replacements. Keep in mind that a compatible ballast is required — this lamp will not function in standard Edison-base sockets or with magnetic ballasts.

Key Features

EFFICIENT LIGHT YOU CAN COUNT ON: This 42W 4-pin triple-tube compact fluorescent bulb is dimmable and designed for electronic ballast fixtures. GX24q-4 plug-in base and amalgam technology for consistent output across a wide temperature range.

CRISP, HIGH-QUALITY 82 CRI LIGHT: Rare earth tri-phosphor delivers accurate, natural-looking color in a cool white 4100K. Amalgam technology maintains 90% lumen output from 40°F to 140°F - consistent performance across a wide temperature range.

12,000 HOUR LIFE - RELIABLE PERFORMANCE: Lasts significantly longer than incandescent alternatives, with no-flicker starting and fast run-up to full brightness. Triple-tube structure supports single-lamp fixture designs for easier maintenance.

USES A FRACTION OF THE ENERGY OF INCANDESCENT: At just 42W, uses about a quarter of the energy of a comparable incandescent. Lower system wattage means meaningful electricity cost reductions over the lamp's rated life.

BUILT FOR DOWNLIGHTS, SCONCES & SURFACE-MOUNTED LUMINAIRES: Ideal for recessed downlights, surface mounted luminaires, offices, healthcare examination rooms or classrooms. A high-output fluorescent light delivering reliable, dimmable performance.

Specifications

Brand
Sylvania
Model
20890
Lamp Type
Compact Fluorescent (CFL), Triple Tube
Wattage
42W
Lumens
3200
Color Temperature
4100K
CRI
82
Base Type
GX24q-4 (4-Pin)
Rated Life
12,000 hours
Ballast Compatibility
Electronic and Dimming
Pack Quantity
10

Frequently Asked Questions

This lamp is designed for use with electronic and dimming ballasts. It will not operate on magnetic ballasts.
It uses a GX24q-4 4-pin base, which is standard for 42W triple-tube compact fluorescent lamps.
This is a 10-pack, so you receive ten CF42DT/E/IN/841/ECO lamps per order.
It produces 4100K light, which is a cool white tone commonly used in office, retail, and commercial environments.
Yes, it is compatible with dimming ballasts, allowing you to adjust light output when paired with an appropriate dimming ballast.

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