---
product_id: 28169853
title: "Circle F13T5 T5 Fluorescent Bulb 21 Inch Under Counter, 13W 4100K, 6 Pack"
brand: "circle"
price: "$83.12"
currency: USD
in_stock: true
category: "Circle"
url: https://www.desertcart.us/products/28169853-circle-f13t5-t5-fluorescent-bulb-21-inch-under-counter-13w
store_origin: US
region: United States of America
---

# 20,000 hours long life 1300 lumens bright output Fits standard 21" T5 fixtures Circle F13T5 T5 Fluorescent Bulb 21 Inch Under Counter, 13W 4100K, 6 Pack

**Brand:** circle
**Price:** $83.12
**Availability:** ✅ In Stock

## Summary

> 💡 Brighten your space, boost your vibe — light that works as hard as you do!

## Quick Answers

- **What is this?** Circle F13T5 T5 Fluorescent Bulb 21 Inch Under Counter, 13W 4100K, 6 Pack by circle
- **How much does it cost?** $83.12 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/28169853-circle-f13t5-t5-fluorescent-bulb-21-inch-under-counter-13w)

## Best For

- circle enthusiasts

## Why This Product

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

## Key Features

- • **Endurance Lighting:** Rated up to 20,000 hours, reducing replacements and maintenance hassle.
- • **Value-Packed 6-Pack:** Stock up and save with a multipack designed to arrive safely and ready to brighten every corner.
- • **Trusted by Thousands:** Join over 2,500 satisfied buyers who rely on Circle for dependable, professional-grade lighting.
- • **Plug & Play Compatibility:** No rewiring needed—drops right into your existing T5 under-cabinet fixtures for instant upgrade.
- • **Crisp 4100K Cool White Glow:** Illuminate your workspace with clean, consistent light that enhances focus and style.

## Overview

The Circle 6 Pack F13T5/CW offers 21-inch T5 fluorescent tubes delivering 1300 lumens of crisp 4100K cool white light. Designed for under-cabinet and over-counter fixtures with a G5 bi-pin base, these 13-watt bulbs fit standard setups without rewiring. With a lifespan of up to 20,000 hours and a trusted 6-pack value, they provide reliable, professional-grade illumination ideal for kitchens, workshops, RVs, and display areas.

## Description

Circle (6 Pack) F13T5/CW - T5 Fluorescent 4100K Cool White - 21" Linear - 13 Watt T5 - Under the Counter Light Bulbs - desertcart.com

## Features

- CLEAR 4100K COOL WHITE LIGHT — ~1,300 lumens of clean, even fluorescent light for kitchens, workshops, RVs and display areas. Crisp cool-white tone, consistent across the 6-pack.
- EXACT 21" T5 UNDER-COUNTER FIT — F13T5 with a G5 bi-pin base drops into standard 21-inch T5 under-cabinet and over-counter fixtures. Insert, twist, done.
- STANDARD FLUORESCENT — USES YOUR EXISTING BALLAST — Genuine T5 tube, not an LED retrofit. Works in fixtures that already run fluorescent bulbs. No rewiring, no electrician.
- RATED UP TO 20,000 HOURS — Long-life output for dependable lighting and fewer replacements across cabinets, RVs, marine fixtures and utility spaces.
- 6-PACK VALUE, PACKED TO ARRIVE INTACT — Cost-effective multipack from Circle in protective packaging built to survive shipping. Trusted across 2,500+ buyer ratings.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01EDMZNI4 |
| Accepted Voltage Frequency | 100 to 120 Volts and 60 Hertz |
| Additional Features | Instant On, Under cabinet lighting |
| Best Sellers Rank | #3,622 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Fluorescent Tubes |
| Brand Name | Circle |
| Bulb Base | G5 |
| Bulb Shape Size | T5 1/2 |
| Color | 4100 |
| Color Rendering Index | 100 |
| Color Temperature | 4100 Kelvin |
| Connectivity Technology | Normal bulb |
| Control Method | App |
| Controller Type | Push Button |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,850) |
| Incandescent Equivalent Wattage | 13 watts |
| Included Components | 6 Pack Long life T5 Fluorescent Tubes, Perfect under the counter kitchen light bulbs, T5 fluorescent bulb |
| Indoor Outdoor Usage | Indoor |
| Item Dimensions W x H | 2.5"W x 21"H |
| Item Weight | 12.8 ounces |
| Light Color | Cool White |
| Light Source Operating Life | 120000 hours |
| Light Source Type | Fluorescent |
| Light Source Wattage | 13 watts |
| Light Type | Fluorescent |
| Manufacturer | Circle® |
| Manufacturer Part Number | F13T5/CW |
| Manufacturer Warranty Description | 1 year warranty. Please contact us if you have any issues. We offer 100% customer satisfaction on all our products! |
| Material Type | Glass |
| Model Number | F13T5/CW |
| Number of Items | 1 |
| Package Quantity | 6 |
| Power Consumption | 13 watts |
| Power Source | Corded Electric |
| Shape | Tubular(T) |
| Style Name | F13T5 |
| UPC | 030465195553 |
| Unit Count | 6 Count |
| Voltage | 120 volts |
| Wattage | 13 watts |
| White Brightness | 1300 lumens |

## Product Details

- **Brand:** Circle
- **Bulb Shape Size:** T5 1/2
- **Light Type:** Fluorescent
- **Special Feature:** Instant On, Under cabinet lighting
- **Wattage:** 13 watts

## Images

![Circle F13T5 T5 Fluorescent Bulb 21 Inch Under Counter, 13W 4100K, 6 Pack - Image 1](https://m.media-amazon.com/images/I/61T7SGQDcoL.jpg)

## Available Options

This product comes in different **Color** options.

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**Shop now:** [https://www.desertcart.us/products/28169853-circle-f13t5-t5-fluorescent-bulb-21-inch-under-counter-13w](https://www.desertcart.us/products/28169853-circle-f13t5-t5-fluorescent-bulb-21-inch-under-counter-13w)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-02*