LED lights are light sources quickly gaining popularity for aquarium use. They produce lots of bright light while using low energy, which makes for the ultimate way to illuminate both fresh and saltwater marine aquariums. Most LED fixtures allow you to dial in the exact color and intensity you would like, unlike T5 and Halide lights. LED's don't need bulb replacements every 6 months as they will generally last for years. They are smart, energy-efficient, output more light, and end up saving you money in the long run. You’re going to be glad you entered the world of LED.