Brand: LSE Lighting Wattage: 25W Type: 254nm Length: 17.17" (436mm) Operating Current: 425mA Base: 4pin EPA Registered Establishment: EPA Est. No. 96823-PA-1 This UV Lamp by LSE Lighting brand is 100% compatible replacement for use with Aqua Ultraviolet Classic 25W model which requires A20025 lamp. All UV lamps listed are compatible LSE Lighting brand UV products. We do not sell Aqua Ultraviolet brand lamps. All Aqua Ultraviolet brand names, trademarks and logos are property of Aqua Ultraviolet respectfully. Warning: UVC light is harmful and dangerous to your eyes and skin. Please Use safety gear during installation.