Zeiger Eco LED Aquarium Light Super bright, energy efficient (15 watt only)and long lasting 5730 LEDs to fit aquarium tank from 14 inches to 20 inches. NEW DESIGN: 360 Swivel Soft arm can be adjusted to any angle and position. No need to remove the fish light cleaning the tank Constant Drive-Mode: Constant current driving is the ideal LED drive mode, it can make the brightness more stable and comfortable without any stroboscopic phenomenon, providing you and the resident of aquarium a friendly visual effect. Ensures waterproof and safety, but not suitable submersion. Suitable to 15-23 Gallon Tank