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Triple-tube CFL bulb with GX24Q-4 base, 42W 3500K

GE

GE 20871 42W 3500K GX24Q-4 CFL standard bulb

SKU CH-BRXZ-Y76WZ

A 42 W compact fluorescent lamp with a GX24Q-4 base, 3500 K colour temperature, 12000-hour rated life and CRI 82 for general lighting

  • Power rating42
  • Color temperature3500K
  • Lifespan (hours)12000
  • Color rendering82
  • Product typeFluorescent Bulbs
  • Bright 3500K light for work areas
  • 42W triple-tube design fits GX24Q-4 fixtures
  • 12000-hour rated life reduces replacement frequency
  • CRI 82 renders colours accurately
  • Amalgam technology maintains output in varying temperatures

Triple compact fluorescent lamp

This triple compact fluorescent amalgam lamp uses a GX24Q-4 base for general lighting fixtures. It operates at 42 watts with a colour temperature of 3500K and a colour rendering index of 82. The rated life is 12000 hours. It suits commercial or residential spaces needing consistent neutral-white output from a four-pin socket.

Replaces 42W CFLs with two-pin bases

The GX24Q-4 base fits electronic ballasts only, so it upgrades magnetic-ballast fixtures once the ballast is swapped. The jump is worth it when longer lamp life and steadier start-up matter more than keeping the existing magnetic gear. It does not suit buyers who want screw-in LED retrofit lamps or fixtures locked to two-pin sockets.

Four-pin insertion into electronic ballast

Align the keyed GX24Q-4 pins and press straight in until the lamp seats firmly; no tools are required. What usually goes wrong is forcing the lamp into a two-pin socket or leaving the old magnetic ballast in place, both of which prevent the lamp from striking. Ensure the fixture carries a compatible electronic ballast before installing.

How it compares

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

Price $6.99
Cheaper than about 87% of the 1,791 comparable items (median $17.99).

Specifications

Product
Brand nameSylvania
Product typeFluorescent Bulbs
Power
Power rating42
More details
Color temperature3500K
Lifespan (hours)12000
Color rendering82

Questions about this item

Does the GX24Q-4 base fit a standard 4-pin socket?

The GX24Q-4 base is a 4-pin design made for compatible CFL fixtures; align the keyed pins with the socket slots before pressing in.

How do I install this triple-tube CFL without damaging the glass?

Hold the plastic base only, not the glass tubes, and push straight into the GX24Q-4 socket until the pins seat firmly.

When should I replace this 42 W bulb rated for 12000 hours?

Plan replacement around 12000 hours of use; light output will gradually decline and colour may shift as the lamp ages.

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