HMi BLOCK lighting controller is used to control HMi smart aquarium lighting system. HMi BLOCK lighting system can emit full spectrum to simulate sunlight changes during a day. BLOCK series contains several built-in datasets which can be used to simulate the various circumstances of worldwide seas such as sunrise time, sunset time, raining days…etc. In addition, it allows users to select a circumstance of certain sea and to fine-tune the circumstance through a smart phone. BLOCK series is suitable for applying to the corals, tropical fishes and freshwater aquatics which live in neritic or deeper zones.