---
product_id: 289272127
title: "(Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21\" Super Long Life Light Bulbs"
brand: "kor"
price: "$92.44"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/289272127-pack-of-6-f13t5-cw-t5-fluorescent-4100k-cool-white
store_origin: US
region: United States of America
---

# 13W Power 900 Lumens 21" Length (Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21" Super Long Life Light Bulbs

**Brand:** kor
**Price:** $92.44
**Availability:** ✅ In Stock

## Summary

> 💡 Light Up Your Life with Style!

## Quick Answers

- **What is this?** (Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21" Super Long Life Light Bulbs by kor
- **How much does it cost?** $92.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/289272127-pack-of-6-f13t5-cw-t5-fluorescent-4100k-cool-white)

## Best For

- kor enthusiasts

## Why This Product

- Trusted kor brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Illuminate Your Space:** Transform your kitchen or office with a crystal-clear glow.
- • **Versatile Applications:** Perfect for under cabinet lighting, RVs, and more.
- • **Effortless Installation:** Quickly install with a simple push and twist mechanism.
- • **Satisfaction Guaranteed:** 100% refund or replacement for a worry-free purchase.
- • **Long-Lasting Performance:** Enjoy up to 15,000 hours of continuous, hassle-free lighting.

## Overview

The F13T5CW T5 21 Inch Under Counter Fluorescent Bulbs offer a cool white 4100K light at just 13 watts, delivering 900 lumens of brightness. This pack of 6 bulbs is designed for easy installation and boasts a lifespan of up to 15,000 hours, making it an ideal choice for enhancing your kitchen or office ambiance.

## Description

KOR(Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21" Super Long Life Light Bulbs

## Features

- Bulb Specs: This pack of 6 bulbs F13T5/CW Fluorescent tubes are 21" long (From end of pins to end of pins) and uses 13 watts and 900 Lumens.
- Color Temperature: Features a 4100K Cool White Light color which creates a crystal clear, Cool White GLOW and eye friendly ambience to your kitchen office and is perfect for household lighting.
- Easy Installation: F13T5 CW linear bulbs have 2 pins at each end. Simply just push into the 2 side sockets and then twist to hold into place then flip on the switch to light up your home or kitchen.
- Continuous Light: Up to 15,000 hours of continuous light which will take away the hassle to change your bulbs so often.
- Applications: These T5 fluorescent tubes are commonly used in under cabinet or under counter lights in your kitchen and in RV as well as various other applications..Packaging: We use protective packing materials to ship our products and we offer 100% full refund or replacement in case of any damages. We strive for a headache free transaction.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | KOR |
| Manufacturer reference | K25674 |
| Package Dimensions | 54.61 x 5.41 x 5.41 cm; 363 Grams |
| ASIN | B00TJ6XL3Y |

## Product Details

- **Brand:** KOR
- **Light Type:** Fluorescent
- **Wattage:** 13 watts
- **Bulb Shape Size:** T5 1/2
- **Incandescent Equivalent Wattage:** 13 Watts

## Images

![(Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21" Super Long Life Light Bulbs - Image 1](https://m.media-amazon.com/images/I/71BkgnkJ+IL.jpg)

## Questions & Answers

**Q: whats the difference between cool light, warm light and daylight????**
A: Warm white and soft white will produce a yellow hue, close to incandescents, while bulbs labeled as cool/bright white will produce a whiter light, closer to daylight and similar to what you see in retail stores.  The three primary types of color temperature for light bulbs are: Soft/warm White (2700K – 3000K), Cool/Bright White (3500K – 4100K), and Daylight (5000K – 6500K). The higher the Degrees Kelvin, the whiter the color temperature.  Typically, most people prefer Warm White (WW = 3000K) bulbs for their homes.

**Q: are 20 inch led fluorescent light tubes made?**
A: I'm not aware of a 20" bulb and a quick internet search didn't reveal any. I've found measurements misleading to an extent. You might measure your old bulb. It might actually be a 21" bulb. It seems to me that the pins are often included in, or at least partially included, in the total measurement.

**Q: is it slim?**
A: Yes they are very slim. I purchased them for an under cabinet/over counter light fixture.

**Q: Are the ends round?  I bought one that the ends were oval & they won’t fit.**
A: My ends are oval.

## Frequently Bought Together

- KOR (Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21" Super Long Life Light Bulbs
- F8T5 Flourescent Light Bulbs - 12 inches Under Cabinet Bulb - Cool White 4100k 8 Watt Tube Bulb - Pack of 6
- KOR (Pack of 6) F8T5/CW - T5 Fluorescent 4100K Cool White - 8 Watt - 12" Super Long Life Light Bulbs

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-08*