GE F4T5/WW/CB 4W Warm White Fluorescent Light Bulb

Name: GE F4T5/WW/CB 4W Warm White Fluorescent Light Bulb
Brand: GE
SKU: F4T5/WW/CB

★★★★★4.3 (55 reviews)

GE's compact 4W T5 fluorescent delivers warm white light for up to 5,000 hours in tight fixtures.

$9.04*

✓ In Stock on Amazon.com

*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The GE F4T5/WW/CB is a 4-watt T5 fluorescent replacement lamp designed for compact fixtures that require a miniature bi-pin G5 base. Operating at a warm white color temperature of 3,000K, it produces 140 lumens of soft, comfortable light that works well in under-cabinet installations, small desk lamps, and accent lighting applications where a gentle glow is preferred over high-output illumination.

With a rated life of 5,000 hours—roughly two years under normal use—this bulb offers dependable performance without frequent replacements. The 4-watt draw makes it extremely energy-efficient, though the trade-off is its limited brightness and a CRI of just 52, which means it won't render colors with the accuracy needed for tasks like artwork or detailed color-critical work. For its intended purpose as a compact, low-power fluorescent replacement, it delivers consistent, warm light at a minimal operating cost.

Key Features

GE, F4T5/WW/CD, 4W, T5 Bulb, Warm White, Fluorescent Replacement Lamp, 140 Lumens, 5,000 Hours, 3,000°ree

Kelvin, Lasts Up To 2 Years, Miniature Bi-Pin G5 Base

Manufactured In China

Specifications

Brand

Model

F4T5/WW/CB

Wattage

Bulb Type

T5 Fluorescent

Initial Lumens

140

Color Temperature

3,000K (Warm White)

Base Type

Miniature Bi-Pin G5

Rated Life

5,000 Hours

CRI

Country of Manufacture

China

Pros & Cons

👍 Pros

Very low 4-watt power consumption keeps energy costs minimal
Compact T5 form factor fits in tight spaces like under-cabinet and desk lamp fixtures
Warm white 3,000K color temperature provides comfortable, non-harsh illumination
5,000-hour rated life means infrequent replacements

👎 Cons

140 lumens is quite dim, limiting this bulb to accent or small-area task lighting
CRI of 52 is low, meaning colors will not appear as vivid or accurate under this light
G5 miniature bi-pin base limits compatibility to specific fixture types
Not dimmable, offering no brightness adjustment

Frequently Asked Questions

What base type does the GE F4T5/WW/CB use?

It uses a miniature bi-pin G5 base, which is standard for T5 fluorescent tubes.

What color temperature does this bulb produce?

It produces a warm white light at 3,000K, similar to traditional incandescent warmth.

How long does this bulb last?

The GE F4T5/WW/CB is rated for 5,000 hours, which GE estimates at approximately two years of typical use.

How bright is this 4-watt bulb?

It produces 140 initial lumens, making it suitable for task lighting in small fixtures, under-cabinet lights, and desk lamps rather than room illumination.