---
product_id: 2444421
title: "GermGuardian LB4000 GENUINE Replacement Bulb for Air Purifiers"
brand: "germguardian"
price: "$55.81"
currency: USD
in_stock: null
reviews_count: 8
category: "Germ Guardian"
url: https://www.desertcart.us/products/2444421-germguardian-lb4000-genuine-replacement-bulb-for-air-purifiers
store_origin: US
region: United States of America
---

# Lasts 10-12 months 5W UV-C power Reduces airborne germs GermGuardian LB4000 GENUINE Replacement Bulb for Air Purifiers

**Brand:** germguardian
**Price:** $55.81
**Availability:** ❌ Out of Stock

## Summary

> 🦠 Light up your space, kill the germs, and breathe the difference!

## Quick Answers

- **What is this?** GermGuardian LB4000 GENUINE Replacement Bulb for Air Purifiers by germguardian
- **How much does it cost?** $55.81 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2444421-germguardian-lb4000-genuine-replacement-bulb-for-air-purifiers)

## 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

- • **Broad Compatibility:** Seamlessly fits multiple GermGuardian models including AC4300BPTCA, AC4825, AC4850PT & AC4900CA for effortless replacement.
- • **Long-Lasting Performance:** Designed to maintain peak UV-C effectiveness for up to 12 months, ensuring continuous clean air without interruption.
- • **Powerful 5-Watt UV-C Light:** Harness the germ-fighting power that actively reduces bacteria, viruses, and mold spores in your air.
- • **Chemical-Free Air Purification:** Eliminate airborne contaminants without harsh sprays—UV-C technology offers a safer, eco-friendly solution.
- • **Genuine Guardian Technologies Part:** Guarantee optimal purifier performance and peace of mind with an authentic replacement bulb.

## Overview

The GermGuardian LB4000 is a genuine 5-watt UV-C replacement bulb engineered to fit a wide range of GermGuardian air purifiers. It uses proven UV-C light technology to reduce airborne bacteria, viruses, mold spores, and volatile organic compounds, providing chemical-free air purification. Designed for indoor use, this bulb lasts 10-12 months depending on usage and environmental factors, ensuring your purifier maintains peak germ-fighting performance.

## 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 |
| Additional Features | UV-C light helps to reduce airborne germs |
| Best Sellers Rank | #42,089 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #315 in Home Air Purifier Parts & Accessories |
| Brand | GermGuardian |
| Brand Name | GermGuardian |
| Brightness | 5 watts watt |
| Bulb Base | GU24 |
| Bulb Shape Size | T |
| Color Rendering Index | 100 |
| Connectivity Technology | Normal bulb |
| Control Method | App |
| Controller Type | Push Button |
| Customer Reviews | 4.7 out of 5 stars 3,432 Reviews |
| Global Trade Identification Number | 00895916000998, 10895916000995 |
| Indoor Outdoor Usage | Indoor |
| Item Dimensions W x H | 1.5"W x 4.3"H |
| Item Height | 1.5 inches |
| Item Type Name | GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers |
| Item Weight | 0.04 Pounds |
| Light Color | White |
| Light Source Operating Life | 334.84 Days |
| Light Source Type | UV-C |
| Light Source Wattage | 5 Watts |
| Light Type | UV-C |
| Manufacturer | Guardian Technologies, LLC |
| Material Type | Glass |
| Model Name | GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers |
| Model Number | LB4000 |
| Number of Items | 1 |
| Package Quantity | 1 |
| Power Consumption | 5 Watts |
| Power Source | AC adapter or DC power supply |
| Shape | Tubular(T) |
| Special Feature | 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
- **Light Type:** UV-C
- **Special Feature:** UV-C light helps to reduce airborne germs
- **Wattage:** 5 watts
- **Bulb Shape Size:** T

## Images

![GermGuardian LB4000 GENUINE Replacement Bulb for Air Purifiers - Image 1](https://m.media-amazon.com/images/I/5133DjRfFsL.jpg)

## 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.

### ⭐⭐⭐⭐⭐ Good recommend replacement
*by S***R on September 5, 2025*

Works well. Excellent fit. No issues. Would recommend.

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/2444421-germguardian-lb4000-genuine-replacement-bulb-for-air-purifiers](https://www.desertcart.us/products/2444421-germguardian-lb4000-genuine-replacement-bulb-for-air-purifiers)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-28*