BioCubes are a great starter aquarium because they feature a compact and customizable filtration chamber that is already built-in to the back of the aquarium. Among other great features are the quiet submersible pump, dual intakes and adjustable return nozzle. Each aquarium is also 2 taller than the original BioCube aquariums, creating a larger viewing area with the new 16 and 32 sizes. Compatible with all existing BioCube accessories. The integrated 24-hour timer makes it easy to control the three independent channels: Bright white, sparkling blue and color enhancing LEDs for maximum beauty. Each BioCube also includes automatic 30 minute sunrise/sunset and 60 minute moonrise/moonset functions to replicate a natural day/night cycle. PAR 38 Peak PAR 61 LUX 2700 Peak LUX 3510 Hinge-top canopy design