AffyBulb 1 * 18W PLL 2G11 4-Pin Replacement UV Bulb Lamp for Pond Filter UVC & Clarifiers

• 【High-Purity Quartz Glass for 96% UVC Transmission】 Crafted from premium quartz glass, this 18W UVC bulb delivers up to 96% UVC transmittance, ensuring maximum germicidal efficiency. Ideal for water purification, it eliminates up to 99.9% of algae, bacteria, and microorganisms in ponds, aquariums, and water treatment systems.
• 【Precise 253.7nm Narrowband Output – No Ozone】 Emits a peak wavelength of 253.7nm with a narrower waveform than standard bulbs, delivering nearly 20% higher energy density for more effective DNA disruption. This specific wavelength does not produce harmful ozone, making it safer for fish and aquatic life while maintaining powerful sterilisation.
• 【Optimised for European 230V Grid & Voltage Fluctuations】 Designed specifically for the UK and European electrical systems, this bulb features a 220–240V wide-voltage starter. Compared to standard 220V-only bulbs, it maintains stable UVC output and longer lifespan even under grid voltage fluctuations, ensuring reliable performance.
• 【Electronic Ballast Only – Critical Compatibility】 This 2G11 4-pin PLL lamp (225mm length) is engineered exclusively for electronic ballasts. It delivers flicker-free instant start and consistent output. ⚠️ Not compatible with magnetic (inductive) ballasts – please verify your fixture type before ordering to prevent damage.
• 【Certified Safety & Reliable Construction】 Fully compliant with CE, RoHS, UKCA, and FCC certifications, ensuring safe operation and environmental responsibility. Built with durable components to withstand continuous use, making it a dependable replacement for your water steriliser, pond clarifier, or UV filtration system.

【About Us】 AffyBulb is a quality manufacturer specialising in the development of pest control equipment. We are committed to providing our customers with safe and reliable products and excellent after-sales service. 【Specifications】 One UVC 18W 2G11 PLL replacement lamp, length 222mm, excluding thimble 215mm, diameter 12mm, lamp holder model: 2G11-4pins 【Tips for use】 1. Before purchasing a lamp, please ensure that you are using the same lamp specification as our product. 2. In order to achieve the best results from our products, we recommend replacing the bulb with a new one every 6-8 months. 3. Due to the sensitivity of the UVC light source to human DNA, direct exposure to people, animals and plants or looking directly at the light source while using the product is prohibited. 【About after-sales service】 If you encounter a broken bulb or a bulb that does not light up, please contact us via Amazon station letter and our customer service will do the return/refund for you. 【About Invoice】 Whether you are a corporate customer or an individual customer, you will be provided with a purchase invoice for all AffyBulb brand products. After payment, the Amazon system will automatically generate a purchase invoice for you, please download it from the order details.