The Lifegard Clip-On USB LED is a cost effective and easy to use LED fixture perfect for pico and nano aquariums. With a full spectrum, most aquarists will use this light over small freshwater aquariums, but it can also be used over small refugiums or macro algae displays in a saltwater environment. The included gooseneck style mount that fits rimless aquariums up to 6mm thick, makes this a budget friendly way of lighting your small aquarium. Plugs into any standard USB power adapter.