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Twin tube fluorescent lamp 2G11 base 22.5 inch 3500K 4000 lumens

GE Lighting

GE Lighting 28506 F50BX/SPX35/RS 50W T5 Twin Tube 3500K 4-Pin 2G11 22.5in 4000lm light bulb

SKU CH-DYQV-6HTG8

A 50 W twin-tube compact fluorescent lamp with 2G11 base, 3500 K colour temperature, 82 CRI and 4000 lumen output

  • 3500K neutral white suits offices and retail spaces
  • 4000 lumens deliver strong light output for large areas
  • 82 CRI renders colours accurately in work environments
  • Rapid start 4-pin 2G11 base ensures quick ignition
  • Twin tube 22.5 inch design fits compatible compact fluorescent fixtures

GE Lighting 28506 T5 Twin Tube

The GE Lighting 28506 is a 50 watt T5 twin tube compact fluorescent lamp built for fixtures that accept a 4-pin 2G11 base. It delivers 4000 lumens at a 3500K colour temperature with an 82 CRI, making it suitable for commercial or retail spaces that need consistent, neutral-white illumination.

Upgrade from lower-output T5 lamps

This lamp replaces lower-lumen T5 twin tubes in existing 2G11 sockets without rewiring. The jump is worth it when a fixture can accommodate the 22.5 inch length and the ballast supports rapid start operation, providing a noticeable increase in light output for the same power draw.

4000 lumens for general indoor lighting

At 4000 lumens the lamp comfortably handles open-plan offices, corridors and display areas where even, neutral-white light is required. It runs out in very high-ceiling or high-bay environments where greater intensity or a different distribution pattern is needed, and in fixtures that cannot accept the 22.5 inch twin tube form factor.

How it compares

Measured against everything we stock in Lighting Fixtures & Bulbs, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 60% of the 491 comparable items (median $28.99).

Specifications

Product
Brand nameGE Lighting

Questions about this item

What fixture dimensions do I need for a 22.5 inch 4-pin 2G11 twin-tube lamp?

The lamp measures 22.5 inches overall and uses a 4-pin 2G11 base, so the fixture must accept that length and socket type.

How do I install this 50 W rapid-start T5 correctly, and what step is often missed?

Align the four pins with the 2G11 socket and push straight in until seated; the common error is twisting the lamp, which can bend the pins.

When will this 4000 lumen 3500 K CFL need replacement?

Replace the lamp when light output drops noticeably or the ends darken, as the 82 CRI 3500 K output will degrade over the rated life.

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