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Transparent triple-tube CFL with 4-pin base

SYLVANIA

SYLVANIA 20887 CF42DT/E/IN/827 42 W 2700 K 3200 lm triple-tube 4-pin CFL

SKU CH-KNA1-W8FZY

42 W triple-tube CFL delivers 3200 lm of 2700 K light with a 4-pin GX24q-4 base and 12000-hour rated life

  • Power rating42 W
  • Light output3200
  • Color temperature2700K
  • Lifespan (hours)12000
  • Color rendering82
  • Product typeFluorescent Bulbs
  • Warm 2700 K light creates a cosy atmosphere
  • 3200 lumens deliver bright illumination for large spaces
  • 42 W power draw keeps energy costs low
  • 12000-hour rated life reduces replacement frequency
  • CRI 82 renders colours accurately for everyday tasks

42 W Triple-Tube CFL for Commercial Fixtures

The Sylvania 20887 is a 42 W compact fluorescent lamp with a GX24q-4 four-pin base and triple-tube design. It delivers 3200 lumens at a warm 2700 K colour temperature with a CRI of 82. Rated life is 12000 hours. The transparent glass envelope suits recessed or enclosed luminaires that accept four-pin CFLs.

Replaces 3800 W Halogen Equivalent

This lamp is intended as a direct replacement for high-wattage halogen sources rated around 3800 W equivalent output. The jump is worth it when the existing fixture uses a compatible four-pin ballast and the user wants lower energy draw with longer relamping intervals. It is not for buyers who need a screw-base retrofit or instant full brightness in cold environments.

Four-Pin Ballast Installation Only

Installation requires a matching electronic ballast wired for the GX24q-4 base; the lamp cannot operate on mains voltage directly. Common issues include mismatched ballast types causing flicker or premature failure, and physical interference in shallow cans where the triple-tube length exceeds the housing depth. Verify ballast compatibility and fixture clearance before fitting.

How it compares

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

Price $8.99
Cheaper than about 80% 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
Display
Light output3200
Power
Power rating42 W
More details
Color temperature2700K
Lifespan (hours)12000
Color rendering82

Questions about this item

Does the GX24q-4 4-pin base fit my existing recessed fixture?

The lamp uses a GX24q-4 4-pin base that matches sockets built for 42 W triple-tube CFLs; verify the socket keying before purchase.

How do I install the 42 W triple-tube CFL without damaging the pins?

Align the four pins with the GX24q-4 socket keyway, push straight in until seated, then twist a quarter-turn to lock; forcing at an angle bends pins.

When should I replace the 20887 lamp rated at 12000 hours?

Plan replacement around 12000 hours of use; expect gradual lumen depreciation and colour shift as the 2700 K phosphor ages.

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