The Sunritek LED Master Controller changes the way you do indoor gardening. With power efficiency at the core of its competency, the Master Controller provides cultivators with the highest efficiency of power to simulate natural sunlight. As an energy-efficient light control system, the Master Controller gives you up to 25 percent savings on electricity costs. Equipped with an automated sunrise and sunset function, the Master Controller lets you set the brightness and the speed of transition of the dimmers. The Master Controller comes equipped with a manual dimmer control that goes from 0 to 100 percent. The Master Controller also features a Dual-Zone control, which lets you run two sets of lights with independent control for each. You can run up to 50-100 grow lights from the touchscreen interface.