Intelligent LED light for biOrb and biUbe aquariums Create a 24 hour lighting cycle as nature intended - reducing the stress on your fish. Simply plug it in - no set up required. Sunrise, daylight, sunset and moonlight cycles -change at the push of a button with 7 different cycles to choose from. Automatic 24 hour timer-just plug the light in and it cycles at the same time everyday. No need to change a bulb-lasts 50,000 hours using long life, low energy cost saving LED's. Safe, low voltage, 12 volt power for use with all Reef One aquariums. Simple and quick replacement for the existing halogen light unit. Concealed in the aquarium lid and only 18 mm thick.