Dimmer The brightness change is shown clearly on the screen by number from 0-100 when dimmer either by knob on the back or by DMX remote control. The knob is pressed down to select the brightness dimming and channel control orderly, which means press the knob 1 time, you can change the brightness by turning the knob and press it 1 more time to change the signal channel. Power It runs on AC power through adapter, or camera battery through the mount adapter (V-lock or Gold mount). The mount can be easy changed. LED luminaries Bicolor Model is with 450pcs 5600K LED lamps and 450pcs 3200K LED lamps.