---
product_id: 61471347
title: "Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering)"
brand: "beam lighting plastics your diffuser source"
price: "6962 som"
currency: KGS
in_stock: true
reviews_count: 8
category: "Beam Lighting Plastics Your Diffuser Source"
url: https://www.desertcart.kg/products/61471347-beam-lighting-21-l-shape-under-cabinet-light-cover-replacement
store_origin: KG
region: Kyrgyzstan
---

# UV-stabilized non-yellowing acrylic Precision 20.875" length fit Proudly American made quality Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering)

**Brand:** beam lighting plastics your diffuser source
**Price:** 6962 som
**Availability:** ✅ In Stock

## Summary

> 💡 Illuminate your space with flawless clarity and American craftsmanship!

## Quick Answers

- **What is this?** Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering) by beam lighting plastics your diffuser source
- **How much does it cost?** 6962 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/61471347-beam-lighting-21-l-shape-under-cabinet-light-cover-replacement)

## Best For

- beam lighting plastics your diffuser source enthusiasts

## Why This Product

- Trusted beam lighting plastics your diffuser source brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** UV-stabilized, non-yellowing acrylic guarantees long-lasting clarity and durability—no yellow haze, ever.
- • **Made in the USA:** Crafted with pride and precision domestically, supporting quality standards and local craftsmanship.
- • **Snap-In Installation:** Effortless, tool-free snap-in mounting saves time and hassle—upgrade your lighting in minutes.
- • **Perfect Fit Every Time:** Engineered to match 21" under cabinet fluorescent fixtures for seamless replacement.
- • **Crystal Clear Diffusion:** Ribbed acrylic design ensures even, glare-free light distribution to elevate your workspace ambiance.

## Overview

This Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement features a 20-7/8” x 2-7/8” x 1” white ribbed acrylic diffuser designed for optimal light diffusion and durability. Made in the USA with UV-stabilized, non-yellowing acrylic, it fits multiple 21-inch fluorescent fixtures and installs easily with a snap-in design, ensuring a perfect, long-lasting upgrade for your under cabinet lighting.

## Description

Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering) - desertcart.com

Review: Plastic cover - Fits my old fixture
Review: Fit and look great - Perfect.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B074KRYC2W |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #207,140 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #877 in Under-Counter Light Fixtures |
| Brand | BEAM Lighting Plastics Your Diffuser Source |
| Certification | UL |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (264) |
| Date First Available | August 4, 2017 |
| Finish | Linear Ribbed |
| Finish Type | Linear Ribbed |
| Installation Method | Snap in |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.2 ounces |
| Item model number | WS-320 |
| Manufacturer | BEAM Lighting Plastics Your Diffuser Source |
| Material | Acrylic |
| Mounting Type | Snap In |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Part Number | ULC21 |
| Pattern | Solid |
| Plug Format | A- US style |
| Power Source | Corded Electric |
| Product Dimensions | 2.88"W x 1"H |
| Shade Material | Acrylic |
| Shape | Corner |
| Special Feature | American made quality |
| Special Features | American made quality |
| Style | Classic |
| Switch Style | Push Button |
| Type of Bulb | Fluorescent |
| UPC | 685642995923 |
| Usage | Residential |
| Voltage | 0.01 Volts |

## Product Details

- **Brand:** BEAM Lighting Plastics Your Diffuser Source
- **Color:** White
- **Finish Type:** Linear Ribbed
- **Material:** Acrylic
- **Mounting Type:** Snap In
- **Pattern:** Solid
- **Product Dimensions:** 2.88"W x 1"H
- **Shape:** Corner
- **Special Feature:** American made quality
- **Style:** Classic

## Images

![Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering) - Image 1](https://m.media-amazon.com/images/I/615keupV9RL.jpg)
![Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering) - Image 2](https://m.media-amazon.com/images/I/51dAyk1-HvL.jpg)
![Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering) - Image 3](https://m.media-amazon.com/images/I/51u5LwGq4wL.jpg)
![Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering) - Image 4](https://m.media-amazon.com/images/I/91Y7p+imCaL.jpg)
![Beam Lighting 21” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 20-7/8” Length x 2-7/8” Width x 1” Height (Please Check The Size is Correct Before Ordering) - Image 5](https://m.media-amazon.com/images/I/91ySGfp895L.jpg)

## Questions & Answers

**Q: That is what I need....but I need 36"....do you have that?**
A: The Amazon link below is for our 33 inch lens, you can order that one and send us a request to custom cut your lens to 36 inches.

https://www.amazon.com/dp/B06Y3CKHNH?ref=myi_title_dp

**Q: How is it instalked?**
A: Installation is easy, it just snaps in.

**Q: Will this product fit a luminaire under cabinet light that is appropriately 3 in wide**
A: The measurements of this cover are correct on the product page. also this cover is flexible so it will bend a little to install.  Yes it will fit a 21X3X1 light that has lip edges to hold it in place (all lights do have them that is why it says 2 and 7/8 size not 3.  I is very good quality--installs easily and diffuses light properly.  I am very pleased with this cover.

**Q: Do you have a 21" T8 fluorescent bulb**
A: No, I have a 21 T5.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Plastic cover
*by S***N on February 28, 2026*

Fits my old fixture

### ⭐⭐⭐⭐⭐ Fit and look great
*by L***D on August 13, 2025*

Perfect.

### ⭐⭐⭐⭐ Good replacement for 30 year old under cabinet fixture
*by P***. on July 24, 2023*

This replacement was decent as you can get for finding a replacement cover for an old under cabinet light fixture. Only minor issue is that there is an 1/8” gap between the cover and end of fixture. However the cover did fit into place which is a plus and you won’t see a naked bulb. Be sure to measure your under cabinet light fixture before you order it.

## Frequently Bought Together

- Beam Lighting Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser (L-Shaped, 21")
- Beam Lighting 42-3/8” L-Shape Under Cabinet Light Cover Replacement | White Ribbed Acrylic Diffuser | 42-3/8” Length x 2-7/8” Width x 1” Height
- (6 Pack) F13T5/CW - T5 Fluorescent 4100K Cool White - 21" Linear - 13 Watt T5 - Under The Counter Light Bulbs

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**Shop now:** [https://www.desertcart.kg/products/61471347-beam-lighting-21-l-shape-under-cabinet-light-cover-replacement](https://www.desertcart.kg/products/61471347-beam-lighting-21-l-shape-under-cabinet-light-cover-replacement)

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-03-17*