This GloFish LED Light Stick is perfect for any fish tank up to 20 gallons. It features three different light modes, including blue, white, and magnetic. The bulb type is LED, which is more energy efficient and lasts longer than traditional bulbs. This light is specifically designed for use in fish aquariums and is perfect for anyone looking to enhance the look of their tank. The brand, GloFish, is known for producing high-quality aquarium lighting products.