Warm Tips: When using the aquarium clean light, place it in the filter or behind an opaque plate to avoid direct light shining on your fish and harm them Aquarium Cleaning: Keep your tank water clean and healthy with this algae cleaning light, suitable for both freshwater and saltwater. We suggest use 3-4 hours every 2-5 days Good Choice for Aquarium Lovers: Aquarium algae cleaning light is suitable for most small water tank filters. Please measure the size of your aquarium or filter before buying and compare it with our product size Silica Glass: The Aquarium light tube, made from High-quality materials operating at a precise 254 nm wavelength, excellent U-V light transmission for optimized water cleaning Reliable Performance: UV aquarium lights works by breaking down certain chemical bonds and scrambling the DNA, RNA and proteins to destroy all destroy things that affect the survival of fish Voltage: AC110V/AC100-240V Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Color: Transparent & Black Material: plastic Package Contents: 1 x germicidal lamp 2 x clips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.