---
product_id: 2444421
title: "GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers"
brand: "germguardian"
price: "€ 52.19"
currency: EUR
in_stock: true
reviews_count: 8
category: "Germ Guardian"
url: https://www.desertcart.nl/products/2444421-germguardian-lb4000-genuine-uv-c-replacement-bulb-for-ac4300bptca-ac4825
store_origin: NL
region: Netherlands
---

# 10-12 months lifespan 5W UV-C power GU24 bulb base GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers

**Brand:** germguardian
**Price:** € 52.19
**Availability:** ✅ In Stock

## Summary

> ✨ Illuminate your space with clean air — because your health deserves the best! 💨

## Quick Answers

- **What is this?** GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers by germguardian
- **How much does it cost?** € 52.19 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/2444421-germguardian-lb4000-genuine-uv-c-replacement-bulb-for-ac4300bptca-ac4825)

## Best For

- germguardian enthusiasts

## Why This Product

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

## Key Features

- • **Seamless Compatibility:** Genuine replacement bulb for multiple GermGuardian models, maintaining peak purifier efficiency.
- • **Long-Lasting Performance:** Designed to last 10-12 months, ensuring consistent air purification and peace of mind.
- • **Chemical-Free Germ Defense:** UV-C light reduces volatile organic compounds and airborne pathogens, creating a healthier environment.
- • **Powerful 5-Watt UV-C Light:** Harness germ-fighting UV-C technology to reduce airborne bacteria, viruses, and mold spores without chemicals.
- • **Easy Installation & Maintenance:** Simple swap with genuine parts keeps your purifier running at optimal performance—don’t settle for less.

## Overview

The GermGuardian LB4000 is a genuine 5-watt UV-C replacement bulb engineered for select GermGuardian air purifiers. It uses UV-C light to effectively reduce airborne bacteria, viruses, mold spores, and volatile organic compounds, providing chemical-free germ defense. With a lifespan of 10-12 months, this easy-to-install bulb ensures your purifier maintains peak performance and healthier indoor air quality.

## Description

GermGuardian® LB4000 UV-C Replacement Bulb is a 5-watt bulb. UV-C light helps reduce airborne bacteria, viruses, mold spores*, and works to reduce volatile organic compounds. *Tested with Staphylococcus Albus, and Escherichia Coli, Aspergillus Niger, and Phi-X174. This bulb needs to be replaced every 10-12 month depending on use and environmental factors. It can be used for the GermGuardian® Air Purifier Models AC4300BPTCA, AC4900, AC4825, AC4850, AC4870, AC5300B, AC5350B, AC5350W, AC5900, CDAP4500, and CDAP5500. The use of this genuine Guardian Technologies™ replacement part will maintain the product's performance.

Review: Perfect! - Works perfectly. Easy to install.
Review: Read this review before returning your INOP bulb - I purchased two bulbs, one for each of my Germ Guardians. I replaced the the first bulb (after reading the Q&A section. yes, its tricky, but one you get the metal plate loose its easy). I replaced the first bulb. It was INOP. then I tried the second bulb on the same unit. Also INOP. I inspected both bulbs and one had a jiggle inside, so I figured it was bad. I tried the "good" one again facing both positions and it was still not working. So I proceeded to return both bulbs on desertcart. I was surprised to get a pop-up window that said "chat with a rep before returning, over 50% of issues with this product can be resolved with a representative." Obviously, I thought that was crazy, but okay, I'll chat. To make a long story short, the rep asked me to try the new bulbs in my Other Germ Guardian. I had not done this because a bulb is either good or bad, right? But I had also read all the reviews saying these bulbs were bad from stock and I thought this couldn't hurt especially since I have a second unit. To my surprise, BOTH the jiggly bulb and the "good" bulb BOTH worked on my other Germ Guardian. Apparently, the connector socket is what failed on my first Germ Guardian, along with the bulb. After inspecting both burned bulbs, I found one to be severely dark while the other was just light brown. The darker one was the one that had the connector burned as well. I understand that most people might not have another Germ Guardian in the the house to do this experiment. But I caution people to test the connector before even buying these bulbs. If you are getting power, then go ahead and purchase the replacement. But if you are not getting power to the socket, don't waste your $. If your Germ Guardian is still under warranty, you may be able to get a replacement for the entire unit. I'm glad I contacted customer service. At least I have UV in my kids room where I need it to kill the stink of shoes :o] My office unit will have to run without the UV until I feel like investing in a new Germ Guardian.

## Features

- 5 Watt bulb with the power of UV-C. UV-C light helps reduce airborne bacteria, viruses, mold spores*, and works to reduce volatile organic compounds.
- UV-C light provides a way to help fight germs without the use of chemical sprays
- Replacement Bulb for GermGuardian Air Purifier Models AC4300BPTCA, AC4900, AC4825, AC4850, AC5300B, AC5350B, AC5350W, AC5900, CDAP4500, and CDAP5500
- Needs to be replaced every 10-12 months depending on use and environmental factors
- IMPORTANT: Use genuine Guardian Technologies replacement parts to maintain product performance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0055522F6 |
| Accepted voltage frequency | 100 to 240 Volts and 50 Hertz to 60 Hertz |
| Average Life | 334.84 Days |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #50,875 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #367 in Home Air Purifier Parts & Accessories |
| Brand | GermGuardian |
| Brightness | 5 watts watt |
| Bulb Base | GU24 |
| Bulb Shape Size | T |
| Color | Clear |
| Color Rendering Index | 100 |
| Control Method | App |
| Customer Reviews | 4.7 4.7 out of 5 stars (3,440) |
| Date First Available | June 8, 2011 |
| Global Trade Identification Number | 00895916000998, 10895916000995 |
| Indoor/Outdoor Usage | Indoor |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 0.64 ounces |
| Item model number | LB4000 |
| Light Color | White |
| Light Source Type | UV-C |
| Light Source Wattage | 5 Watts |
| Light Type | UV-C |
| Manufacturer | Guardian Technologies, LLC |
| Material | Glass |
| Model Name | GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers |
| Number of Items | 1 |
| Part Number | LB4000 |
| Power Consumption | 5 Watts |
| Power Source | AC adapter or DC power supply |
| Product Dimensions | 1.5"W x 4.3"H |
| Shape | Tubular(T) |
| Size | 1 Count (Pack of 1) |
| Special Feature | UV-C light helps to reduce airborne germs |
| Special Features | UV-C light helps to reduce airborne germs |
| Specification Met | CSA |
| UPC | 895916000998 |
| Unit Count | 1 Count |
| Voltage | 120 Volts |
| Wattage | 5 watts |

## Product Details

- **Brand:** GermGuardian
- **Bulb Shape Size:** T
- **Light Type:** UV-C
- **Special Feature:** UV-C light helps to reduce airborne germs
- **Wattage:** 5 watts

## Images

![GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers - Image 1](https://m.media-amazon.com/images/I/5133DjRfFsL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can someone provide specifics on how to get to bulb to change it**
A: Take off the big filter on the back, and look above where it was to find two small Phillips screws. Remove those and pop off the cover. Make sure you don't touch the new bulb glass with your fingers! Hold it by the styrofoam and then remove the styrofoam once the bulb is in place.

**Q: Is there a trick to removing the metal panel? I’ve removed the screws but can’t pop it off.**
A: It's difficult to say if "there is a trick" if the model of your air filter unit is unknown.  I would suggest you look up your specific model for bulb replacement procedures.  My Oransi unit required no trick to removing the metal shield.

**Q: Is there a trick to popping off the metal cover? I can’t get it off.**
A: The UV bulb shield is held in by 2 screws which need to be removed.  The metal shield will pull straight out towards you.  You may need to wiggle it a bit and use some force to get it out the first time.  If you need additional assistance, please contact yourfriends@guardiantechnologies.com or call 1-866-603-5900

**Q: Does this fit the oransi finn air purifier**
A: Yes it fix greatly, the blessings is mind blowing of the price for it as well. Thinks for having  the bulbs available to us.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect!
*by S***W on November 3, 2025*

Works perfectly. Easy to install.

### ⭐⭐⭐⭐⭐ Read this review before returning your INOP bulb
*by C***S on May 5, 2019*

I purchased two bulbs, one for each of my Germ Guardians. I replaced the the first bulb (after reading the Q&A section. yes, its tricky, but one you get the metal plate loose its easy). I replaced the first bulb. It was INOP. then I tried the second bulb on the same unit. Also INOP. I inspected both bulbs and one had a jiggle inside, so I figured it was bad. I tried the "good" one again facing both positions and it was still not working. So I proceeded to return both bulbs on amazon. I was surprised to get a pop-up window that said "chat with a rep before returning, over 50% of issues with this product can be resolved with a representative." Obviously, I thought that was crazy, but okay, I'll chat. To make a long story short, the rep asked me to try the new bulbs in my Other Germ Guardian. I had not done this because a bulb is either good or bad, right? But I had also read all the reviews saying these bulbs were bad from stock and I thought this couldn't hurt especially since I have a second unit. To my surprise, BOTH the jiggly bulb and the "good" bulb BOTH worked on my other Germ Guardian. Apparently, the connector socket is what failed on my first Germ Guardian, along with the bulb. After inspecting both burned bulbs, I found one to be severely dark while the other was just light brown. The darker one was the one that had the connector burned as well. I understand that most people might not have another Germ Guardian in the the house to do this experiment. But I caution people to test the connector before even buying these bulbs. If you are getting power, then go ahead and purchase the replacement. But if you are not getting power to the socket, don't waste your $. If your Germ Guardian is still under warranty, you may be able to get a replacement for the entire unit. I'm glad I contacted customer service. At least I have UV in my kids room where I need it to kill the stink of shoes :o] My office unit will have to run without the UV until I feel like investing in a new Germ Guardian.

### ⭐⭐⭐⭐⭐ Great Replacement UV Bulbs that made our machines work like new!
*by A***! on July 3, 2023*

I am so happy to write a glowing review. This is for the replacement bulbs of an air purifier. The outside air in Florida, after last year's hurricanes, was "yucky" - I haven't been able to get the air quality records from the Florida department that keeps them for the EPA, though I am pretty sure that the weather-folks on TV said the air quality was yucky. Unfortunately, the outside air does not stay outside. And, personally, I would rather a machine filter that air than it fill the noses and lungs of the people in my home. We got these air filters almost a year ago. Replaced the HEPA filters once. And, now we've replaced both the filter and the UV bulb. Easy. A lot less expensive than the original machines. And, now they are like new. Just in time for the US Army Corps of Engineers to send their toxin-laden water racing down what we call the Caloosahatchee River. If this is what life will be like in our era of changing weather, at least this is a product that is both helpful and not too expensive for what it does.

## Frequently Bought Together

- GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers
- GermGuardian Filter B HEPA Pure Genuine Air Purifier Filter, Removes 99.97% of Pollutants, Wildfire Smoke, Odors, for AC4825, AC4300, AC4850, AC4880, AC4900, CDAP4500, AP2200, Black/Yellow, FLT4825
- Germ Guardian FLT5000 True HEPA Genuine Air Purifier Replacement Filter C for GermGuardian AC5000E, AC5250PT, AC5300B, AC5350B, CDAP5500, and More

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-17*