110v/220v Waterproof Germicidal Uv Sterilizer Light For Aquarium - Submersible. Enhance the Health and Clarity of Your Aquarium with This High-quality Ultraviolet Sterilizer Lamp. Crafted from Durable Quartz Glass, It is Designed to Effectively Control Harmful Bacteria in Aquariums and Fish Tanks. With a Range of Wattages Available (5W, 7W, 9W, 11W, 13W), You Can Select the Perfect Fit for Your Setup. The Waterproof and Submersible Design Ensures Safe Use, While the Powerful Suction Cups Allow for Easy Positioning. An Independent Power Switch Adds an Extra Layer of Safety. Available with US or EU Plug Options to Suit Your Needs. Features: - Wattage Options: 5W, 7W, 9W, 11W, 13W - Plug Types: US/EU - Voltage: US: AC110-120V, EU: 220V - Material: Quartz Glass - Cable Length: Approx. 145cm (57 Inches) - Size: - 5W/7W: 19mm X 185mm (0.74 X 7.28) - 9W: 19mm X 220mm (0.8 X 8.66) - 11W/13W: 19mm X 240mm (0.8 X 9.45) - Key Features: - Energy-saving High-performance Filament - Explosion-proof Quartz Glass for Effective UV Transmission - Submersible and Waterproof Design - Independent Power Switch for Safety - Includes Two Suction Cups for Easy Placement Usage Notes: - Place in the Filter Tank, Not Directly in the Fish Tank. - Limit Usage to 3-4 Times a Week, No More Than 2 Hours Per Day. - Avoid Direct Exposure to Skin, Eyes, and Pets..