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Transparent triple-tube fluorescent bulb with four-pin base

SYLVANIA

SYLVANIA 20871 CF42DT/E/IN/835 42 W Triple Tube 4 Pin Fluorescent Bulb

SKU CH-H0R4-X6KD0

42 W triple-tube fluorescent bulb with GX24q-4 base, 12000-hour life and 82 CRI

  • Power rating42 W
  • Lifespan (hours)12000
  • Color rendering82
  • Product typeFluorescent Bulbs
  • Product colorTransparent
  • 42 W delivers 3800 W halogen equivalency
  • 12000 hours rated life reduces replacement frequency
  • 82 CRI provides accurate colour rendering
  • GX24q-4 4-pin base fits compatible fixtures
  • 835 colour temperature offers neutral white light

42 W Triple Tube Fluorescent Bulb

This 42 W compact fluorescent lamp uses a triple tube design with a GX24q-4 four-pin base. It delivers a colour rendering index of 82 and a rated life of 12000 hours. The bulb suits commercial or residential fixtures that require a high-output CFL with 835 colour designation.

Transparent Glass and Four-Pin Base

The transparent glass envelope allows full light distribution without a diffusing coating. A GX24q-4 base locks into compatible electronic ballasts with a twist-and-lock action, preventing loose contact in ceiling recesses or wall sconces. Build quality meets standard CFL durability expectations for indoor use.

California Proposition 65 Notice Included

Documentation supplied with the bulb carries the required Proposition 65 warnings for chemicals known to cause cancer and reproductive harm. No additional accessories, ballasts or software are bundled. Installers must verify fixture compatibility with 42 W four-pin CFLs before fitting.

How it compares

Measured against everything we stock in General-Purpose & Specialty Bulbs, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 92% of the 1,791 comparable items (median $17.99).
Power rating 42 W
Lower than about 60% of the 162 comparable items (median 70 W).

Specifications

Product
Brand nameSylvania
Product typeFluorescent Bulbs
Product colorTransparent
Power
Power rating42 W
More details
Lifespan (hours)12000
Color rendering82

Questions about this item

What base does the GX24q-4 4-pin interface require in the fixture?

The GX24q-4 4-pin base fits only sockets keyed for that exact pin pattern; it will not seat in 2-pin or other 4-pin sockets.

What are the tube length and overall diameter that determine whether the triple tube fits the housing?

The T4 triple-tube design measures approximately 24 mm tube diameter; total length varies by ballast housing but stays within standard compact fluorescent envelopes.

Does the 42 W lamp need a programmed-start ballast and which wiring mistake causes early failure?

It requires a compatible electronic ballast rated for 42 W 4-pin lamps; reversing the two lamp leads on rapid-start ballasts is the common error that kills the bulb.

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