Grower's Choice Master ControllerDescription Master Controller: The Grower's Choice digital lighting controller gives the ability for the grower to control as many as 200 fixtures. This model is adaptable with every GC 315 CMH, GC 630NS CMH, GC 1000 DE fixtures, as well as ROI Series LED grow lights. Dual Channel Controller: This feature allows up to 100 fixtures per zone for daisy chaining. The added advantage of daisy chaining is that it allows the linking of several devices