... , connect the negtive pole wire(R,G,B wire) to controller.3, usually, each 300 pcs RGB pixel lamps can connect ... pixel lamp can be connected.2, using this type of controller, just can divide the lamps into 3 groups. During this ... each group, connect the negtive pole wire(white wire) to controller separately.5,usually, each 500 pcs pixel lamps can connect ...