Breathe new life into your aquarium with the GloFish Cycle Aquarium Light! This robust lighting system includes four modes—transform your aquarium in moonlight mode with all blue LED lights on, midnight mode with all black lights on, twilight mode with blue and black light fade or sunlight mode with all lights turned on. This unique light changes the viewing experience of your fluorescent decorations (sold separately) and enriches the colors of your fish in bold and exciting ways. Each set is easy to install and fits aquariums up to 75 gallons in size. Great for use with GloFish-brand fluorescent fish, plants and decor (each sold separately).