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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

★★★★★4.5 (101 reviews)
42W

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

$36.79*$45.96Save 19%
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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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

Lumens: 3200

Base Type: GX24q-4

Life Hours: 12,000

Wattage: 42 Watt

Color Temperature: 4100K

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

Pros & Cons

👍 Pros

  • 10-pack bulk quantity reduces per-lamp cost and keeps spares on hand
  • 3200-lumen output provides strong illumination from a compact form factor
  • 12,000-hour rated life minimizes replacement frequency in commercial installations
  • 82 CRI delivers accurate color rendering for office and retail environments
  • Compatible with both electronic and dimming ballasts for flexible installation

👎 Cons

  • GX24q-4 base limits compatibility to fixtures designed for 4-pin triple-tube CFLs
  • Requires a compatible ballast to operate and will not work in standard screw-in sockets
  • CFL technology is less energy-efficient than modern LED equivalents
  • Contains mercury, requiring proper disposal and recycling procedures

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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