The Fresh-Aire UV -215 - Blue Tube Ultraviolet Light For Bacteria , Mold and Viruses with 100 sq coverage Replacement Bulb is a high-quality replacement component designed to maintain optimal performance in your UV light purification system. Engineered specifically for the Blue Tube series, this bulb effectively eliminates airborne contaminants such as bacteria, viruses, and mold spores, ensuring cleaner and healthier indoor air. With its durable construction and precise wavelength output, this replacement bulb delivers reliable UV-C light disinfection, helping to improve indoor air quality and promote a safer environment. Easy to install and long-lasting, it provides continuous protection against harmful microorganisms, making it an essential component for any UV air purification system.