Check the listing for details. Pura, Pentek 36002018 ,UV20, VU22, UVSS-6,UVSS-6M, 25W UV Compatible Bulb, Lamp. Condition: New. Listed at 19.99 USD. You are purchasing one unit of the Emperor Aquatics 02025, 20025 25W UV Compatible Sterilizer Pond Bulb, Lamp 10,000 Hour Long Life Lamp 1 Year WarrantyIncludes Free Gloves for Handling 25 Watts UV Hot Cathode Germicidal UV Bulbs (UV-C), are low-pressure mercury arc lamps that are the most effective tool for eliminating microorganisms such as virus, bacteria, mold and yeast in the air and impurities in water. Produces UV-C (253.7 nm wavelength) radiation (harmful to eyes and skin). Specifications:WATTAGE: 25W AMPERAGE: 0.425 AVERAGE LIFE: 10,000 Hours BASE TYPE: 4 Pin PIN PATTERN: Square Box BULB SHAPE: T-5 (T5) T5F LENGTH: 18 in. FAMILY: Germicidal UVC LampsENDS: Single End BULB FINISH: Clear BURNING POSITION: Universal Burn OUTPUT: UV-C SPECTRAL PEAK: 253.7nm Compatible Bulb Guaranteed to Meet or Exceed Manufacturers Specifications and Performance. Buy Wholesale from the Importer. We stand behind our products and Guarantee Same day Shipment and 100% Buyer Satisfaction. All lamps are brand NEW, packaged individually and are 100% Guaranteed