---
product_id: 267174794
title: "Lightwise LWL7W40-F13T5 21\" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3"
brand: "lightwise"
price: "664 kr"
currency: DKK
in_stock: true
reviews_count: 5
url: https://www.desertcart.dk/products/267174794-lightwise-lwl7w40-f13t5-21-direct-replacement-led-tube-7-watt
store_origin: DK
region: Denmark
---

# 50,000 Hour Lifespan 50% Energy Saving 900 Lumen Brightness Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3

**Brand:** lightwise
**Price:** 664 kr
**Availability:** ✅ In Stock

## Summary

> Illuminate Your Life! 💡

## Quick Answers

- **What is this?** Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3 by lightwise
- **How much does it cost?** 664 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/267174794-lightwise-lwl7w40-f13t5-21-direct-replacement-led-tube-7-watt)

## Best For

- lightwise enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** UL Listed for peace of mind and shipped securely in a protective tube.
- • **Dimmable & Versatile:** Customize your lighting experience with dimmable features and shatterproof design.
- • **Transform Your Space:** Upgrade your under-cabinet lighting effortlessly with a direct replacement.
- • **Eco-Friendly Efficiency:** Slash your energy consumption by over 50% without sacrificing brightness.
- • **Long-Lasting Performance:** Enjoy up to 50,000 hours of cool white illumination.

## Overview

The Lightwise LWL7W40-F13T5 is a 21-inch direct replacement LED tube that offers a seamless upgrade from traditional T5 fluorescent tubes. With a power consumption of just 7 watts, it delivers a bright 900 lumens of cool white light at 4000K, ensuring over 50% energy savings. Designed for easy installation, this durable LED tube boasts a lifespan of up to 50,000 hours and is UL Listed for safety.

## Description

Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3

## Features

- Direct Replace 21'' T5 13W tubes from your T5 Under-Cabinet Lights to get over 50% light and energy saving
- Alum Body and Milky PC cover provide great 900 Lumen 4000K Cool lights
- Long life up to 50,000 hours and much cooler operation than regular Fluo.system
- Upgrade your Under-cabinet lights system from 13W to 7W w/o any extra job, just replace the tube directly
- UL Listed and safety shipping in brown hard paper tube.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 136 g |
| Package Quantity | 1 |
| Unit Count | 3 count |
| Material Type | Polycarbonate (PC) |
| Item Shape | Tubular(T) |
| Power Source | AC From Previous Ballast Output |
| Color Rendering Index | 0.88 |
| Beam angle | 120 Degrees |
| Power Consumption | 7 Watts |
| Light Source Operating Life | 50000 Hours |
| Light Source Type | LED |
| Light Source Wattage | 7 Watts |
| Control Method | App |
| Light Color | Cool White |
| Voltage | 120 Volts |
| Color Temperature | 4000 Kelvin |
| Brightness | 900 Lumen |
| Connectivity Technology | Normal bulb |
| Controller Type | Push Button |
| Light Type | Fluorescent |
| Special Features | Dimmable, shatterproof |
| Wattage | 4.00 |
| Bulb Shape Size | T8 |
| Bulb Base | G5 |
| Incandescent Equivalent Wattage | 7 Watts |
| Specific Uses For Product | Indoor use only |

## Product Details

- **Brand:** LightWise
- **Light type:** Fluorescent
- **Special features:** Dimmable, shatterproof
- **Wattage:** 4.00
- **Bulb shape/size:** T8

## Images

![Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3 - Image 1](https://m.media-amazon.com/images/I/61nh4fTWavL.jpg)
![Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3 - Image 2](https://m.media-amazon.com/images/I/51YQCUSaHnL.jpg)
![Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3 - Image 3](https://m.media-amazon.com/images/I/51u8LVvGz-L.jpg)
![Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3 - Image 4](https://m.media-amazon.com/images/I/41KvIl4vOUL.jpg)
![Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3 - Image 5](https://m.media-amazon.com/images/I/313E6Jr5TnL.jpg)

## Questions & Answers

**Q: Can these be wired directly to 110VAC without a ballast?**
A: The LED tube must work with a ballast which powered previous fluorescent tube.

**Q: Will the bulbs work with a starter?**
A: If the fixture is over 30 years old, you may need to remove the starter. If the starter is causing problems, the bulb will flash.

**Q: Just received these.  I ran them for about 2 minutes and they get very warm. Is this normal?**
A: Mine give off just the slightest bit of warmth but nothing that I would consider "very warm" Hope that helps

**Q: What if the Ballast is not working? Will it still work?**
A: These bulbs require a working fluorescent ballast.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Direct Replacement LED light tubes worked without having to modify existing light fixture ballast!
  

*by J***D on Reviewed in the United States on 21 February 2024*

Wanted to replace the existing 21" fluorescent light tubes with LED ones without having to modify the ballast in the light fixture.  Found these Lightwise F13T5 Direct Replacement LED light tubes on Amazon that fit this need.  The existing light fixture and its ballast is very old (perhaps 30-40 years old?), so was unsure whether these Direct Replacement LED light tubes would actually work.Installed two of them in the light fixture and actually held my breath while flipping the light switch on.  Was very happy and pleasantly surprised to see the new LED lights immediately turn on without any flickering.  They were a perfect fit and installed much like the old fluorescent ones...just needed to make sure that the LED lights were oriented downwards after being seated in the socket.  I like the 4000k brightness and they are cool white, without a purple/pink tint like a few other reviewers encountered.Time will tell whether these LED light tubes last longer than the last set of fluorescent ones did (i.e., those were terrible and would burn out every couple of months).  So far, I'm very happy with this purchase!

### ⭐⭐⭐⭐⭐ 







  
  
    Good value for the money, super bright too.
  

*by D***F on Reviewed in Canada on 6 July 2019*

Great replacement lights. I had two of six of the old fluorescent bulbs blown out. The price for those was virtually the same, except that it costs allot more to use them vice these! I originally bought a pack of 3, when they arrived and I installed them, I had to buy more and subsequently bought another two packs. Tome you can’t go wrong with these bulbs.

### ⭐⭐⭐⭐⭐ 







  
  
    T5 7W LED light is brighter and easy to install
  

*by V***I on Reviewed in the United States on 29 April 2024*

This T5 7W LED light replaces my T5 18W light is easy to install and has less power than the standard T5 18W light.  It should last longer than the standard light bulbs. Immediately, I can see that is LED replacement is brighter.  I changed all 4 light bulbs to LED light bulbs.

## Frequently Bought Together

- Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3
- LightWise LWL4W40-F8T5 12" Direct Replacement Led Tube, 4-Watt, White, 4000K, Set of 3
- LWL4W40-F8T5 12“ 4Watts White LED T5 Tube with 4000K to Retrofit for 8W T5 Fluorescent Tube of Your Under-Cabinet Lights to get Over 50% Energy Saving! Replace Directly! F8T5-LED4W40 (8)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-22*