POWERFUL PERFORMANCE: This UVC light is specifically designed to optimize water filtration systems in ponds, pools, and similar environments, significantly improving water purification efficiency with a rate of up to 99.9%. Crafted with a high-transmission quartz tube and a G23 base, it ensures a long lifespan of up to 8,000 hours, offering a cost-effective solution for continuous use. ENVIRONMENTALLY SAFE: Free from harmful substances, this UV bulb helps maintain excellent water quality in ponds and filtration systems. Please follow proper disposal procedures at the end of its lifespan to minimize environmental impact and support a healthier planet. Avoid direct exposure to UV radiation. EASY TO USE: Always power off the device before installing or replacing the UV bulb to prevent electrical hazards. Insert the bulb into the designated socket using the correct installation method, ensuring the UV tube remains undamaged. This bulb is compatible with inductive ballasts only and is not suitable for devices with electronic ballasts. VERSATILE APPLICATION: Designed for adaptability and ease of use, this UV lamp is simple to install and transport. It is specifically engineered for lighting systems with a G23 base, 13W lamps, and inductive ballasts, ensuring reliable performance in compatible setups. EXTENSIVE COMPATIBILITY: This bulb is suitable for a wide range of pond and fountain filters, including various GPH-rated pond filters requiring a 13-watt UV lamp, delivering consistent and effective water purification. Color: As Shown Material: Glass Package Contents: 2 x 13W UV-C Replacement Bulb Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.