--- product_id: 369814348 title: "GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers" brand: "germguardian" price: "€ 92.51" currency: EUR in_stock: true reviews_count: 5 category: "Germ Guardian" url: https://www.desertcart.hr/products/369814348-germguardian-lb4000-genuine-uv-c-replacement-bulb-for-ac4300bptca-ac4825 store_origin: HR region: Croatia --- # 10-12 months lifespan 5W UV-C power Genuine Guardian tech GermGuardian LB4000 Genuine UV-C Replacement Bulb for AC4300BPTCA, AC4825, AC4850PT & AC4900CA Germ Guardian Air Purifiers **Brand:** germguardian **Price:** € 92.51 **Availability:** βœ… In Stock ## Summary > πŸ’‘ Stay ahead of germs with genuine UV power β€” because your air 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?** € 92.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/369814348-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 - β€’ **Easy Installation:** Swap bulbs quickly and get back to breathing cleaner air without downtime. - β€’ **Wide Compatibility:** Fits multiple GermGuardian models for seamless, hassle-free upgrades. - β€’ **Powerful 5-Watt UV-C Bulb:** Harness the germ-fighting strength that keeps your air purifier at peak performance. - β€’ **Long-Lasting UV Protection:** Replace every 10-12 months to maintain a consistently healthy environment. - β€’ **Genuine Guardian Technology:** Ensure optimal purifier efficiency with authentic replacement parts. ## Overview The GermGuardian LB4000 is a genuine 5-watt UV-C replacement bulb designed for select GermGuardian air purifiers. Engineered to maintain optimal germ-killing performance, it requires replacement every 10-12 months depending on usage. Compatible with a broad range of models, this authentic bulb ensures your purifier continues delivering clean, healthy air efficiently and reliably. ## Description GermGuardian LB4000 UV-C Replacement Bulb is a 5-watt bulb. 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, CDAP5500. The use of this genuine Guardian Technologies replacement part will maintain the product's performance. Review: Works perfectly. Easy to install. Review: 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 - This is a GENUINE GermGuardian UV C bulb for GermGuardian Air Purifier Models AC4300BTPCA, AC4300WPT, AC4900, AC4825, AC4825W, AC4850PT, AC5300B, AC5350B, AC5350W, AC5900, CDAP4500 and CDAP5500 - IMPORTANT: Use Genuine Guardian Technologies replacement parts to maintain product performance - 5 Watt bulb with the power of UV-C - This bulb needs to be replaced every 10 to 12 months depending on use and environmental factors ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0055522F6 | | Batteries required | No | | Customer Reviews | 4.7 4.7 out of 5 stars (3,290) | | Date First Available | 27 January 2014 | | Finish types | Clear | | Item Weight | 18 g | | Item model number | LB4000 | | Product Dimensions | 12.07 x 3.81 x 3.81 cm; 18.14 g | | Specific uses | Air purifier UV-C light source | ## Product Details - **Brand:** GermGuardian - **Bulb shape/size:** T - **Light type:** LED - **Special features:** 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) ## 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 ### ⭐⭐⭐⭐⭐ Review *by S***W on 3 November 2025* Works perfectly. Easy to install. ### ⭐⭐⭐⭐⭐ Review *by C***S on 5 May 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. ### ⭐⭐⭐⭐⭐ Review *by S***R on 5 September 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/369814348-germguardian-lb4000-genuine-uv-c-replacement-bulb-for-ac4300bptca-ac4825](https://www.desertcart.hr/products/369814348-germguardian-lb4000-genuine-uv-c-replacement-bulb-for-ac4300bptca-ac4825) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-22*