The Poseidon Tribe-Plug & Play 30-36 in Aquarium LED Light is a great choice for those who want to create their own custom 24 hour light cycle. With its simulated sunrise and sunset function, you can easily stimulate a slow, continuous ramp-up from off to on over fifteen minutes. The bright daylight and nightlight promote healthy, vibrant growth of fish and aquatic plants. The adjustable mounting legs make installation easy on any aquarium tank size, while the easy plug & play capability means you don’t have to do any complicated programming.